uppy/packages/@uppy/utils/src/getETA.js

import getSpeed from './getSpeed.js'
import getBytesRemaining from './getBytesRemaining.js'

export default function getETA (fileProgress) {
  if (!fileProgress.bytesUploaded) return 0

  const uploadSpeed = getSpeed(fileProgress)
  const bytesRemaining = getBytesRemaining(fileProgress)
  const secondsRemaining = Math.round((bytesRemaining / uploadSpeed) * 10) / 10

  return secondsRemaining
}