Metric Conversion Chart (One Page, Printable)
The US customary, imperial and metric conversions people use most, on a single printable page: length, area, volume, weight, speed, pressure, energy, temperature and the SI prefixes. Print it on A4 or US Letter, or as an A3 poster for the classroom or workshop wall.
Standards and method
Values are calculated from the shared conversion-factor library. Exact defined relationships are preserved; displayed results are rounded only for readability.
Maintained by Miguel Coelho. Updated . See our editorial policy.
Printable metric conversion chart
US customary and imperial to metric on one page: length, area, volume, weight, speed, pressure, energy and temperature. Includes the exact definition, formulas, a worked example and sources. Conversion values are checked against the defining constants, and reference data is cited to its source, before the PDF is published.
Free to print, share and use in teaching materials with attribution (CC BY 4.0).
Also in the Classroom Unit Conversion Pack, with related sheets in one PDF.
Full metric conversion chart
US customary and imperial to metric on one page: length, area, volume, weight, speed, pressure, energy and temperature. These are the same tables as the printable PDF. For: Students, teachers, cooks, travellers, engineers and anyone switching between US and metric units.
- Exact definition
- 1 in = 2.54 cm, 1 lb = 0.453 592 37 kg, 1 US gal = 3.785 411 784 L (all exact)
- Formula
- value in "To" units = value × factor
- Reverse
- value in "From" units = value ÷ factor
- Worked example
- 5 miles × 1.609344 = 8.05 km; 2 lb × 0.4535924 = 0.907 kg
- Rounding
- Factors to 7 significant figures. US cups, pints, quarts and gallons differ from UK (imperial) ones.
Length
| From | To | Multiply by |
|---|---|---|
| Inches (in) | cm | 2.54 |
| Centimetres (cm) | in | 0.3937008 |
| Feet (ft) | m | 0.3048 |
| Metres (m) | ft | 3.28084 |
| Yards (yd) | m | 0.9144 |
| Miles (mi) | km | 1.609344 |
| Kilometres (km) | mi | 0.6213712 |
| Nautical miles (nmi) | km | 1.852 |
Area
| From | To | Multiply by |
|---|---|---|
| Square inches (in²) | cm² | 6.4516 |
| Square feet (ft²) | m² | 0.09290304 |
| Square metres (m²) | ft² | 10.76391 |
| Acres (ac) | ha | 0.4046856 |
| Hectares (ha) | ac | 2.471054 |
| Square miles (mi²) | km² | 2.589988 |
Volume (US)
| From | To | Multiply by |
|---|---|---|
| US teaspoons (tsp) | mL | 4.928922 |
| US tablespoons (tbsp) | mL | 14.78676 |
| US fluid ounces (US fl oz) | mL | 29.57353 |
| US cups (US cup) | mL | 236.5882 |
| US pints (US pt) | L | 0.4731765 |
| US quarts (US qt) | L | 0.9463529 |
| US gallons (US gal) | L | 3.785412 |
| Litres (L) | US gal | 0.2641721 |
Volume (UK and solid)
| From | To | Multiply by |
|---|---|---|
| UK pints (UK pt) | L | 0.5682612 |
| UK gallons (UK gal) | L | 4.54609 |
| Cubic inches (in³) | cm³ | 16.38706 |
| Cubic feet (ft³) | m³ | 0.02831685 |
| Cubic feet (ft³) | L | 28.31685 |
Weight and mass
| From | To | Multiply by |
|---|---|---|
| Ounces (oz) | g | 28.34952 |
| Grams (g) | oz | 0.03527396 |
| Pounds (lb) | kg | 0.4535924 |
| Kilograms (kg) | lb | 2.204623 |
| Stones (st) | kg | 6.350293 |
Speed
| From | To | Multiply by |
|---|---|---|
| Miles per hour (mph) | km/h | 1.609344 |
| Kilometres per hour (km/h) | mph | 0.6213712 |
| Knots (kn) | km/h | 1.852 |
| Metres per second (m/s) | km/h | 3.6 |
Pressure
| From | To | Multiply by |
|---|---|---|
| psi (psi) | kPa | 6.894757 |
| Bar (bar) | psi | 14.50377 |
| Atmospheres (atm) | kPa | 101.325 |
Energy and power
| From | To | Multiply by |
|---|---|---|
| Kilowatt-hours (kWh) | MJ | 3.6 |
| British thermal units (BTU) | kJ | 1.055056 |
| Kilocalories (kcal) | kJ | 4.184 |
| Horsepower (mech.) (hp) | kW | 0.7456999 |
| BTU per hour (BTU/h) | W | 0.2930711 |
Temperature
°F = °C × 9/5 + 32; °C = (°F − 32) × 5/9; K = °C + 273.15
| °C | °F | Meaning |
|---|---|---|
| -40 | −40 | Same on both scales |
| 0 | 32 | Water freezes |
| 20 | 68 | Room temperature |
| 37 | 98.6 | Body temperature |
| 100 | 212 | Water boils (sea level) |
| 180 | 356 | Moderate oven |
Metric (SI) prefixes
| Prefix | Symbol | Factor |
|---|---|---|
| giga | G | 10⁹ |
| mega | M | 10⁶ |
| kilo | k | 10³ |
| hecto | h | 10² |
| deci | d | 10⁻¹ |
| centi | c | 10⁻² |
| milli | m | 10⁻³ |
| micro | µ | 10⁻⁶ |
| nano | n | 10⁻⁹ |
Sources for this chart
Conversion values on this sheet are generated by the AllUnitConversions conversion library and automatically checked against the exact definitions above before the PDF is produced; reference tables are taken from the sources listed.
- International Yard and Pound Agreement (1959) — 1 in = 25.4 mm, 1 ft = 0.3048 m, 1 lb = 0.453 592 37 kg exactly
- NIST Special Publication 811 — Guide for the Use of the International System of Units
- BIPM SI Brochure, 9th edition — Definitions of the SI units, including the kelvin
Related Converters & Charts
Metric Conversion Chart (One Page, Printable) FAQs
Common questions about the metric conversion chart.
How many centimetres are in an inch?
Exactly 2.54 cm, by international agreement since 1959. A foot is 30.48 cm and a yard is 0.9144 m.
How many litres are in a gallon?
A US gallon is 3.785 L (exactly 3.785411784 L); a UK (imperial) gallon is 4.546 L (exactly 4.54609 L).
Can I print this metric chart as a poster?
Yes. Download the A3 classroom poster as well as the A4 and US Letter versions. The chart is free to print and share with attribution (CC BY 4.0).
Can I download this chart as a PDF, CSV, or JSON?
Yes. Use the Download A4 PDF or US Letter PDF buttons for a printable version, or download the same tables as CSV or JSON from the links on this page.