diff --git a/docs/src/manpage.md b/docs/src/manpage.md
index eee87469b..120b4b550 100644
--- a/docs/src/manpage.md
+++ b/docs/src/manpage.md
@@ -2388,7 +2388,15 @@ MILLER(1)                                                            MILLER(1)
         (class=system #args=0) Returns the hostname as a string.
 
    1mint0m
-        (class=conversion #args=1) Convert int/float/bool/string to int.
+        (class=conversion #args=1,2) Convert int/float/bool/string to int. If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix. If the second argument is provided and the first argument is a string, the second argument is used as the base. If the second argument is provided and the first argument is not a string, the second argument is ignored.
+       Examples:
+       int("345") gives decimal 345 (base-10/decimal input is inferred)
+       int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)
+       int("0377") gives decimal 255 (base-8/octal input is inferred)
+       int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)
+       int("0377", 10) gives decimal 377
+       int(345, 16) gives decimal 345
+       int(string(345), 16) gives decimal 837
 
    1minvqnorm0m
         (class=math #args=1) Inverse of normal cumulative distribution function. Note that invqorm(urand()) is normally distributed.
@@ -3338,5 +3346,5 @@ MILLER(1)                                                            MILLER(1)
 
 
 
-                                  2023-03-12                         MILLER(1)
+                                  2023-03-24                         MILLER(1)
 </pre>
diff --git a/docs/src/manpage.txt b/docs/src/manpage.txt
index 72c8a2c67..c78f1b415 100644
--- a/docs/src/manpage.txt
+++ b/docs/src/manpage.txt
@@ -2367,7 +2367,15 @@ MILLER(1)                                                            MILLER(1)
         (class=system #args=0) Returns the hostname as a string.
 
    1mint0m
-        (class=conversion #args=1) Convert int/float/bool/string to int.
+        (class=conversion #args=1,2) Convert int/float/bool/string to int. If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix. If the second argument is provided and the first argument is a string, the second argument is used as the base. If the second argument is provided and the first argument is not a string, the second argument is ignored.
+       Examples:
+       int("345") gives decimal 345 (base-10/decimal input is inferred)
+       int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)
+       int("0377") gives decimal 255 (base-8/octal input is inferred)
+       int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)
+       int("0377", 10) gives decimal 377
+       int(345, 16) gives decimal 345
+       int(string(345), 16) gives decimal 837
 
    1minvqnorm0m
         (class=math #args=1) Inverse of normal cumulative distribution function. Note that invqorm(urand()) is normally distributed.
@@ -3317,4 +3325,4 @@ MILLER(1)                                                            MILLER(1)
 
 
 
-                                  2023-03-12                         MILLER(1)
+                                  2023-03-24                         MILLER(1)
diff --git a/docs/src/reference-dsl-builtin-functions.md b/docs/src/reference-dsl-builtin-functions.md
index 116c00be7..90bf09e00 100644
--- a/docs/src/reference-dsl-builtin-functions.md
+++ b/docs/src/reference-dsl-builtin-functions.md
@@ -547,7 +547,15 @@ hexfmt  (class=conversion #args=1) Convert int to hex string, e.g. 255 to "0xff"
 
 ### int
 <pre class="pre-non-highlight-non-pair">
-int  (class=conversion #args=1) Convert int/float/bool/string to int.
+int  (class=conversion #args=1,2) Convert int/float/bool/string to int. If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix. If the second argument is provided and the first argument is a string, the second argument is used as the base. If the second argument is provided and the first argument is not a string, the second argument is ignored.
+Examples:
+int("345") gives decimal 345 (base-10/decimal input is inferred)
+int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)
+int("0377") gives decimal 255 (base-8/octal input is inferred)
+int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)
+int("0377", 10) gives decimal 377
+int(345, 16) gives decimal 345
+int(string(345), 16) gives decimal 837
 </pre>
 
 
diff --git a/internal/pkg/bifs/types.go b/internal/pkg/bifs/types.go
index f1e1b6a30..b876aa780 100644
--- a/internal/pkg/bifs/types.go
+++ b/internal/pkg/bifs/types.go
@@ -55,6 +55,53 @@ func BIF_int(input1 *mlrval.Mlrval) *mlrval.Mlrval {
 	return to_int_dispositions[input1.Type()](input1)
 }
 
+// ----------------------------------------------------------------
+func string_to_int_with_base(input1, input2 *mlrval.Mlrval) *mlrval.Mlrval {
+	i, ok := lib.TryIntFromStringWithBase(input1.AcquireStringValue(), input2.AcquireIntValue())
+	if ok {
+		return mlrval.FromInt(i)
+	} else {
+		return mlrval.ERROR
+	}
+}
+
+func int_to_int_with_base(input1, input2 *mlrval.Mlrval) *mlrval.Mlrval {
+	return mlrval.FromInt(int64(input1.AcquireIntValue()))
+}
+
+func float_to_int_with_base(input1, input2 *mlrval.Mlrval) *mlrval.Mlrval {
+	return mlrval.FromInt(int64(input1.AcquireFloatValue()))
+}
+
+func bool_to_int_with_base(input1, input2 *mlrval.Mlrval) *mlrval.Mlrval {
+	if input1.AcquireBoolValue() == true {
+		return mlrval.FromInt(1)
+	} else {
+		return mlrval.FromInt(0)
+	}
+}
+
+var to_int_with_base_dispositions = [mlrval.MT_DIM]BinaryFunc{
+	/*INT    */ int_to_int_with_base,
+	/*FLOAT  */ float_to_int_with_base,
+	/*BOOL   */ bool_to_int_with_base,
+	/*VOID   */ _void,
+	/*STRING */ string_to_int_with_base,
+	/*ARRAY  */ _erro,
+	/*MAP    */ _erro,
+	/*FUNC   */ _erro,
+	/*ERROR  */ _erro,
+	/*NULL   */ _null,
+	/*ABSENT */ _absn,
+}
+
+func BIF_int_with_base(input1, input2 *mlrval.Mlrval) *mlrval.Mlrval {
+	if !input2.IsInt() {
+		return mlrval.ERROR
+	}
+	return to_int_with_base_dispositions[input1.Type()](input1, input2)
+}
+
 // ----------------------------------------------------------------
 func string_to_float(input1 *mlrval.Mlrval) *mlrval.Mlrval {
 	f, ok := lib.TryFloatFromString(input1.AcquireStringValue())
diff --git a/internal/pkg/dsl/cst/builtin_function_manager.go b/internal/pkg/dsl/cst/builtin_function_manager.go
index 72ae7558b..8a6ca2d67 100644
--- a/internal/pkg/dsl/cst/builtin_function_manager.go
+++ b/internal/pkg/dsl/cst/builtin_function_manager.go
@@ -1529,10 +1529,25 @@ Note that NaN has the property that NaN != NaN, so you need 'is_nan(x)' rather t
 		},
 
 		{
-			name:      "int",
-			class:     FUNC_CLASS_CONVERSION,
-			help:      "Convert int/float/bool/string to int.",
-			unaryFunc: bifs.BIF_int,
+			name:  "int",
+			class: FUNC_CLASS_CONVERSION,
+			help: `Convert int/float/bool/string to int.
+If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix.
+If the second argument is provided and the first argument is a string, the second argument is used as the base.
+If the second argument is provided and the first argument is not a string, the second argument is ignored.`,
+
+			unaryFunc:          bifs.BIF_int,
+			binaryFunc:         bifs.BIF_int_with_base,
+			hasMultipleArities: true,
+			examples: []string{
+				`int("345") gives decimal 345 (base-10/decimal input is inferred)`,
+				`int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)`,
+				`int("0377") gives decimal 255 (base-8/octal input is inferred)`,
+				`int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)`,
+				`int("0377", 10) gives decimal 377`,
+				`int(345, 16) gives decimal 345`,
+				`int(string(345), 16) gives decimal 837`,
+			},
 		},
 
 		{
diff --git a/internal/pkg/lib/util.go b/internal/pkg/lib/util.go
index 00c139da3..4a8faa86d 100644
--- a/internal/pkg/lib/util.go
+++ b/internal/pkg/lib/util.go
@@ -122,6 +122,27 @@ func TryIntFromString(input string) (int64, bool) {
 	return 0, false
 }
 
+// TryIntFromStringWithBase allows the user to choose the base that's used,
+// rather than inferring from 0x prefix, etc as TryIntFromString does.
+func TryIntFromStringWithBase(input string, base int64) (int64, bool) {
+	// Go's strconv parses "1_2" as 12; not OK for Miller syntax. (Also not valid JSON.)
+	for i := 0; i < len(input); i++ {
+		if input[i] == '_' {
+			return 0, false
+		}
+	}
+
+	i64, ierr := strconv.ParseInt(input, int(base), 64)
+	if ierr == nil {
+		return i64, true
+	}
+	u64, uerr := strconv.ParseUint(input, int(base), 64)
+	if uerr == nil {
+		return int64(u64), true
+	}
+	return 0, false
+}
+
 func TryFloatFromString(input string) (float64, bool) {
 	// Go's strconv parses "1_2.3_4" as 12.34; not OK for Miller syntax. (Also not valid JSON.)
 	for i := 0; i < len(input); i++ {
diff --git a/man/manpage.txt b/man/manpage.txt
index 72c8a2c67..c78f1b415 100644
--- a/man/manpage.txt
+++ b/man/manpage.txt
@@ -2367,7 +2367,15 @@ MILLER(1)                                                            MILLER(1)
         (class=system #args=0) Returns the hostname as a string.
 
    1mint0m
-        (class=conversion #args=1) Convert int/float/bool/string to int.
+        (class=conversion #args=1,2) Convert int/float/bool/string to int. If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix. If the second argument is provided and the first argument is a string, the second argument is used as the base. If the second argument is provided and the first argument is not a string, the second argument is ignored.
+       Examples:
+       int("345") gives decimal 345 (base-10/decimal input is inferred)
+       int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)
+       int("0377") gives decimal 255 (base-8/octal input is inferred)
+       int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)
+       int("0377", 10) gives decimal 377
+       int(345, 16) gives decimal 345
+       int(string(345), 16) gives decimal 837
 
    1minvqnorm0m
         (class=math #args=1) Inverse of normal cumulative distribution function. Note that invqorm(urand()) is normally distributed.
@@ -3317,4 +3325,4 @@ MILLER(1)                                                            MILLER(1)
 
 
 
-                                  2023-03-12                         MILLER(1)
+                                  2023-03-24                         MILLER(1)
diff --git a/man/mlr.1 b/man/mlr.1
index 296057e05..a56102ec0 100644
--- a/man/mlr.1
+++ b/man/mlr.1
@@ -2,12 +2,12 @@
 .\"     Title: mlr
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: ./mkman.rb
-.\"      Date: 2023-03-12
+.\"      Date: 2023-03-24
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "MILLER" "1" "2023-03-12" "\ \&" "\ \&"
+.TH "MILLER" "1" "2023-03-24" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Portability definitions
 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -3362,7 +3362,15 @@ gsub("prefix4529:suffix8567", "(....ix)([0-9]+)", "[\e1 : \e2]") gives "[prefix
 .RS 0
 .\}
 .nf
- (class=conversion #args=1) Convert int/float/bool/string to int.
+ (class=conversion #args=1,2) Convert int/float/bool/string to int. If the second argument is omitted and the first argument is a string, base is inferred from the first argument's prefix. If the second argument is provided and the first argument is a string, the second argument is used as the base. If the second argument is provided and the first argument is not a string, the second argument is ignored.
+Examples:
+int("345") gives decimal 345 (base-10/decimal input is inferred)
+int("0xff") gives decimal 255 (base-16/hexadecimal input is inferred)
+int("0377") gives decimal 255 (base-8/octal input is inferred)
+int("0b11010011") gives decimal 211 which is hexadecimal 0xd3 (base-2/binary input is inferred)
+int("0377", 10) gives decimal 377
+int(345, 16) gives decimal 345
+int(string(345), 16) gives decimal 837
 .fi
 .if n \{\
 .RE
diff --git a/test/cases/dsl-int-function/0001/cmd b/test/cases/dsl-int-function/0001/cmd
new file mode 100644
index 000000000..d7f76d762
--- /dev/null
+++ b/test/cases/dsl-int-function/0001/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input -S put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0001/experr b/test/cases/dsl-int-function/0001/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0001/expout b/test/cases/dsl-int-function/0001/expout
new file mode 100644
index 000000000..ab8496f1a
--- /dev/null
+++ b/test/cases/dsl-int-function/0001/expout
@@ -0,0 +1,4 @@
+345 345
+0xff 255
+0377 255
+0b11010011 211
diff --git a/test/cases/dsl-int-function/0001/input b/test/cases/dsl-int-function/0001/input
new file mode 100644
index 000000000..99c79a8dc
--- /dev/null
+++ b/test/cases/dsl-int-function/0001/input
@@ -0,0 +1,4 @@
+345
+0xff
+0377
+0b11010011
diff --git a/test/cases/dsl-int-function/0001/mlr b/test/cases/dsl-int-function/0001/mlr
new file mode 100644
index 000000000..7296cbee4
--- /dev/null
+++ b/test/cases/dsl-int-function/0001/mlr
@@ -0,0 +1 @@
+$2 = int($1) + 0
diff --git a/test/cases/dsl-int-function/0002/cmd b/test/cases/dsl-int-function/0002/cmd
new file mode 100644
index 000000000..d7f76d762
--- /dev/null
+++ b/test/cases/dsl-int-function/0002/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input -S put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0002/experr b/test/cases/dsl-int-function/0002/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0002/expout b/test/cases/dsl-int-function/0002/expout
new file mode 100644
index 000000000..718c74309
--- /dev/null
+++ b/test/cases/dsl-int-function/0002/expout
@@ -0,0 +1,4 @@
+345 345
+ff (error)
+0377 377
+11010011 11010011
diff --git a/test/cases/dsl-int-function/0002/input b/test/cases/dsl-int-function/0002/input
new file mode 100644
index 000000000..a96c3f79b
--- /dev/null
+++ b/test/cases/dsl-int-function/0002/input
@@ -0,0 +1,4 @@
+345
+ff
+0377
+11010011
diff --git a/test/cases/dsl-int-function/0002/mlr b/test/cases/dsl-int-function/0002/mlr
new file mode 100644
index 000000000..6abe84bfd
--- /dev/null
+++ b/test/cases/dsl-int-function/0002/mlr
@@ -0,0 +1 @@
+$2 = int($1, 10) + 0
diff --git a/test/cases/dsl-int-function/0003/cmd b/test/cases/dsl-int-function/0003/cmd
new file mode 100644
index 000000000..d7f76d762
--- /dev/null
+++ b/test/cases/dsl-int-function/0003/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input -S put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0003/experr b/test/cases/dsl-int-function/0003/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0003/expout b/test/cases/dsl-int-function/0003/expout
new file mode 100644
index 000000000..221c7d603
--- /dev/null
+++ b/test/cases/dsl-int-function/0003/expout
@@ -0,0 +1,4 @@
+345 837
+ff 255
+0377 887
+11010011 285278225
diff --git a/test/cases/dsl-int-function/0003/input b/test/cases/dsl-int-function/0003/input
new file mode 100644
index 000000000..a96c3f79b
--- /dev/null
+++ b/test/cases/dsl-int-function/0003/input
@@ -0,0 +1,4 @@
+345
+ff
+0377
+11010011
diff --git a/test/cases/dsl-int-function/0003/mlr b/test/cases/dsl-int-function/0003/mlr
new file mode 100644
index 000000000..200604370
--- /dev/null
+++ b/test/cases/dsl-int-function/0003/mlr
@@ -0,0 +1 @@
+$2 = int($1, 16) + 0
diff --git a/test/cases/dsl-int-function/0004/cmd b/test/cases/dsl-int-function/0004/cmd
new file mode 100644
index 000000000..d7f76d762
--- /dev/null
+++ b/test/cases/dsl-int-function/0004/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input -S put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0004/experr b/test/cases/dsl-int-function/0004/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0004/expout b/test/cases/dsl-int-function/0004/expout
new file mode 100644
index 000000000..5aa6437f4
--- /dev/null
+++ b/test/cases/dsl-int-function/0004/expout
@@ -0,0 +1,4 @@
+345 229
+ff (error)
+0377 255
+11010011 2363401
diff --git a/test/cases/dsl-int-function/0004/input b/test/cases/dsl-int-function/0004/input
new file mode 100644
index 000000000..a96c3f79b
--- /dev/null
+++ b/test/cases/dsl-int-function/0004/input
@@ -0,0 +1,4 @@
+345
+ff
+0377
+11010011
diff --git a/test/cases/dsl-int-function/0004/mlr b/test/cases/dsl-int-function/0004/mlr
new file mode 100644
index 000000000..b43ceab48
--- /dev/null
+++ b/test/cases/dsl-int-function/0004/mlr
@@ -0,0 +1 @@
+$2 = int($1, 8) + 0
diff --git a/test/cases/dsl-int-function/0005/cmd b/test/cases/dsl-int-function/0005/cmd
new file mode 100644
index 000000000..d7f76d762
--- /dev/null
+++ b/test/cases/dsl-int-function/0005/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input -S put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0005/experr b/test/cases/dsl-int-function/0005/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0005/expout b/test/cases/dsl-int-function/0005/expout
new file mode 100644
index 000000000..edd424e78
--- /dev/null
+++ b/test/cases/dsl-int-function/0005/expout
@@ -0,0 +1,4 @@
+345 (error)
+ff (error)
+0377 (error)
+11010011 211
diff --git a/test/cases/dsl-int-function/0005/input b/test/cases/dsl-int-function/0005/input
new file mode 100644
index 000000000..a96c3f79b
--- /dev/null
+++ b/test/cases/dsl-int-function/0005/input
@@ -0,0 +1,4 @@
+345
+ff
+0377
+11010011
diff --git a/test/cases/dsl-int-function/0005/mlr b/test/cases/dsl-int-function/0005/mlr
new file mode 100644
index 000000000..c7010266e
--- /dev/null
+++ b/test/cases/dsl-int-function/0005/mlr
@@ -0,0 +1 @@
+$2 = int($1, 2) + 0
diff --git a/test/cases/dsl-int-function/0006/cmd b/test/cases/dsl-int-function/0006/cmd
new file mode 100644
index 000000000..44a3e2871
--- /dev/null
+++ b/test/cases/dsl-int-function/0006/cmd
@@ -0,0 +1 @@
+mlr --nidx --from ${CASEDIR}/input put -f ${CASEDIR}/mlr
diff --git a/test/cases/dsl-int-function/0006/experr b/test/cases/dsl-int-function/0006/experr
new file mode 100644
index 000000000..e69de29bb
diff --git a/test/cases/dsl-int-function/0006/expout b/test/cases/dsl-int-function/0006/expout
new file mode 100644
index 000000000..0e069fb60
--- /dev/null
+++ b/test/cases/dsl-int-function/0006/expout
@@ -0,0 +1,4 @@
+345 345
+ff (error)
+0377 255
+11010011 11010011
diff --git a/test/cases/dsl-int-function/0006/input b/test/cases/dsl-int-function/0006/input
new file mode 100644
index 000000000..a96c3f79b
--- /dev/null
+++ b/test/cases/dsl-int-function/0006/input
@@ -0,0 +1,4 @@
+345
+ff
+0377
+11010011
diff --git a/test/cases/dsl-int-function/0006/mlr b/test/cases/dsl-int-function/0006/mlr
new file mode 100644
index 000000000..b43ceab48
--- /dev/null
+++ b/test/cases/dsl-int-function/0006/mlr
@@ -0,0 +1 @@
+$2 = int($1, 8) + 0