diff --git a/package.json b/package.json
index cdcd285..73d82eb 100644
--- a/package.json
+++ b/package.json
@@ -1,10 +1,11 @@
 {
   "name": "react-time-duration-input",
-  "version": "0.0.0-development",
+  "version": "1.0.0",
   "description": "React component for input time durations",
   "main": "dist/index.js",
   "scripts": {
     "test": "jest",
+    "test-watch": "jest --watch",
     "coverage": "jest --coverage",
     "lint": "eslint ./src/**/*.js",
     "prepublishOnly": "babel ./src --ignore src/**/*.test.js --out-dir ./dist -s inline",
diff --git a/src/components/TimeDurationInput/index.js b/src/components/TimeDurationInput/index.js
index b90b823..735d72a 100644
--- a/src/components/TimeDurationInput/index.js
+++ b/src/components/TimeDurationInput/index.js
@@ -1,18 +1,19 @@
 import React, { useState, useCallback, useEffect } from 'react'
 import PropTypes from 'prop-types'
 
-export function TimeDurationInput ({ value, onChange, className }) {
-  const [ duration, setDuration ] = useState(convertValueToDuration(value))
+export function TimeDurationInput ({ value, scale, onChange, className }) {
+  const [ duration, setDuration ] = useState(convertFromValue(value, scale))
+
   useEffect(() => {
-    const newDuration = convertValueToDuration(value)
+    const newDuration = convertFromValue(value, scale)
     if (newDuration !== duration) setDuration(newDuration)
-  }, [ value ])
+  }, [ value, scale ])
 
   const onInputChange = useCallback(({ target }) => {
     setDuration(target.value)
-    const newValue = convertDurationToValue(target.value)
+    const newValue = convertToValue(target.value, scale)
     if (!isNaN(newValue)) onChange(newValue)
-  }, [ onChange ])
+  }, [ onChange, scale ])
 
   return (
     <input type="text" className={className} value={duration} onChange={onInputChange} data-testid="duration-input" />
@@ -21,14 +22,32 @@ export function TimeDurationInput ({ value, onChange, className }) {
 
 TimeDurationInput.propTypes = {
   value: PropTypes.number,
+  scale: PropTypes.oneOf([ 'd', 'h', 'm', 's', 'ms' ]),
   onChange: PropTypes.func,
   className: PropTypes.string
 }
 
 TimeDurationInput.defaultProps = {
+  scale: 'ms',
   onChange: () => {}
 }
 
+export const SCALE_CONVERSIONS = {
+  ms: 1,
+  s: 1000,
+  m: 60000,
+  h: 3600000,
+  d: 86400000
+}
+
+export function convertValueFromScale (value, scale) {
+  return value * (SCALE_CONVERSIONS[scale] || 1)
+}
+
+export function convertValueToScale (value, scale) {
+  return value / (SCALE_CONVERSIONS[scale] || 1)
+}
+
 export function convertValueToDuration (value) {
   const milliseconds = Math.round(value % 1000)
   const seconds = Math.floor(value / 1000 % 60)
@@ -51,4 +70,8 @@ export function convertDurationToValue (duration) {
   return (((days * 24 + hours) * 60 + minutes) * 60 + seconds) * 1000 + milliseconds
 }
 
+export const convertFromValue = (value, scale) => convertValueToDuration(convertValueFromScale(value, scale))
+
+export const convertToValue = (duration, scale) => convertValueToScale(convertDurationToValue(duration), scale)
+
 export default TimeDurationInput
diff --git a/src/components/TimeDurationInput/index.test.js b/src/components/TimeDurationInput/index.test.js
index b4b4032..5adac93 100644
--- a/src/components/TimeDurationInput/index.test.js
+++ b/src/components/TimeDurationInput/index.test.js
@@ -207,4 +207,106 @@ describe('TimeDurationInput', () => {
       })
     })
   })
+
+  describe('scaled values', () => {
+    describe('when value = 250 and scale = "ms"', () => {
+      it('displays "250ms" in the input element', () => {
+        const { getByTestId } = render(<TimeDurationInput value={250} scale="ms" />)
+
+        expect(getByTestId('duration-input')).toHaveValue('250ms')
+      })
+    })
+
+    describe('when value = 250 and scale = "s"', () => {
+      it('displays "4m 10s" in the input element', () => {
+        const { getByTestId } = render(<TimeDurationInput value={250} scale="s" />)
+
+        expect(getByTestId('duration-input')).toHaveValue('4m 10s')
+      })
+    })
+
+    describe('when value = 250 and scale = "m"', () => {
+      it('displays "4h 10m" in the input element', () => {
+        const { getByTestId } = render(<TimeDurationInput value={250} scale="m" />)
+
+        expect(getByTestId('duration-input')).toHaveValue('4h 10m')
+      })
+    })
+
+    describe('when value = 250 and scale = "h"', () => {
+      it('displays "10d 10h" in the input element', () => {
+        const { getByTestId } = render(<TimeDurationInput value={250} scale="h" />)
+
+        expect(getByTestId('duration-input')).toHaveValue('10d 10h')
+      })
+    })
+
+    describe('when value = 250 and scale = "d"', () => {
+      it('displays "250d" in the input element', () => {
+        const { getByTestId } = render(<TimeDurationInput value={250} scale="d" />)
+
+        expect(getByTestId('duration-input')).toHaveValue('250d')
+      })
+    })
+
+    describe('when scale = "ms" and input is changed to "1h 45m"', () => {
+      it('calls onChange with value 6300000', () => {
+        const onChange = jest.fn()
+        const { getByTestId } = render(<TimeDurationInput scale="ms" onChange={onChange} />)
+
+        fireEvent.change(getByTestId('duration-input'), { target: { value: '1h 45m' } })
+
+        expect(onChange.mock.calls.length).toBe(1)
+        expect(onChange.mock.calls[0][0]).toBe(6300000)
+      })
+    })
+
+    describe('when scale = "s" and input is changed to "1h 45m"', () => {
+      it('calls onChange with value 6300', () => {
+        const onChange = jest.fn()
+        const { getByTestId } = render(<TimeDurationInput scale="s" onChange={onChange} />)
+
+        fireEvent.change(getByTestId('duration-input'), { target: { value: '1h 45m' } })
+
+        expect(onChange.mock.calls.length).toBe(1)
+        expect(onChange.mock.calls[0][0]).toBe(6300)
+      })
+    })
+
+    describe('when scale = "m" and input is changed to "1h 45m"', () => {
+      it('calls onChange with value 105', () => {
+        const onChange = jest.fn()
+        const { getByTestId } = render(<TimeDurationInput scale="m" onChange={onChange} />)
+
+        fireEvent.change(getByTestId('duration-input'), { target: { value: '1h 45m' } })
+
+        expect(onChange.mock.calls.length).toBe(1)
+        expect(onChange.mock.calls[0][0]).toBe(105)
+      })
+    })
+
+    describe('when scale = "h" and input is changed to "1h 45m"', () => {
+      it('calls onChange with value 1.75', () => {
+        const onChange = jest.fn()
+        const { getByTestId } = render(<TimeDurationInput scale="h" onChange={onChange} />)
+
+        fireEvent.change(getByTestId('duration-input'), { target: { value: '1h 45m' } })
+
+        expect(onChange.mock.calls.length).toBe(1)
+        expect(onChange.mock.calls[0][0]).toBeCloseTo(1.75)
+      })
+    })
+
+    describe('when scale = "d" and input is changed to "1h 45m"', () => {
+      it('calls onChange with value 0.0729167 (approx.)', () => {
+        const onChange = jest.fn()
+        const { getByTestId } = render(<TimeDurationInput scale="d" onChange={onChange} />)
+
+        fireEvent.change(getByTestId('duration-input'), { target: { value: '1h 45m' } })
+
+        expect(onChange.mock.calls.length).toBe(1)
+        expect(onChange.mock.calls[0][0]).toBeCloseTo(0.0729167)
+      })
+    })
+  })
 })
diff --git a/src/components/TimeDurationInput/scale.test.js b/src/components/TimeDurationInput/scale.test.js
new file mode 100644
index 0000000..33ed8c7
--- /dev/null
+++ b/src/components/TimeDurationInput/scale.test.js
@@ -0,0 +1,43 @@
+import { convertValueFromScale, convertValueToScale } from './index'
+
+const SCENARIOS = [
+  { value: 0, scales: { d: 0, h: 0, m: 0, s: 0, ms: 0 } }
+]
+
+describe('convertValueFromScale(value, scale)', () => {
+  describe('when scale is invalid', () => {
+    it('returns the passed value', () => {
+      const value = Math.random()
+      expect(convertValueFromScale(value, 'invalid')).toBeCloseTo(value)
+    })
+  })
+
+  SCENARIOS.forEach(({ value, scales }) => {
+    Object.keys(scales).forEach(scale => {
+      describe(`when value = ${scales[scale]} and scale = "${scale}"`, () => {
+        it(`returns ${value}`, () => {
+          expect(convertValueFromScale(scales[scale], scale)).toBeCloseTo(value)
+        })
+      })
+    })
+  })
+})
+
+describe('convertValueToScale(value, scale)', () => {
+  describe('when scale is invalid', () => {
+    it('returns the passed value', () => {
+      const value = Math.random()
+      expect(convertValueToScale(value, 'invalid')).toBeCloseTo(value)
+    })
+  })
+
+  SCENARIOS.forEach(({ value, scales }) => {
+    Object.keys(scales).forEach(scale => {
+      describe(`when value = ${value} and scale = "${scale}"`, () => {
+        it(`returns ${scales[scale]}`, () => {
+          expect(convertValueToScale(value, scale)).toBeCloseTo(scales[scale])
+        })
+      })
+    })
+  })
+})