Free tools

Free Unit Converters & Calculators

Instant, exact conversions for weight and size, plus calorie and coin-weight tools — with the formula, a conversion table and everyday examples on every page.

Weight & mass

g → oz

Grams to Ounces

1 gram (g) is equal to 0.

oz → g

Ounces to Grams

1 ounce (oz) is equal to 28.

g → lb

Grams to Pounds

1 gram (g) is equal to 0.

lb → g

Pounds to Grams

1 pound (lb) is equal to 453.

g → kg

Grams to Kilograms

1 gram (g) is equal to 0.

kg → g

Kilograms to Grams

1 kilogram (kg) is equal to 1000 grams (g).

kg → lb

Kilograms to Pounds

1 kilogram (kg) is equal to 2.

lb → kg

Pounds to Kilograms

1 pound (lb) is equal to 0.

oz → lb

Ounces to Pounds

1 ounce (oz) is equal to 0.

lb → oz

Pounds to Ounces

1 pound (lb) is equal to 16 ounces (oz).

g → mg

Grams to Milligrams

1 gram (g) is equal to 1000 milligrams (mg).

mg → g

Milligrams to Grams

1 milligram (mg) is equal to 0.

Size & length

cm → in

Centimeters to Inches

1 centimeter (cm) is equal to 0.

in → cm

Inches to Centimeters

1 inch (in) is equal to 2.

m → ft

Meters to Feet

1 meter (m) is equal to 3.

ft → m

Feet to Meters

1 foot (ft) is equal to 0.

mm → in

Millimeters to Inches

1 millimeter (mm) is equal to 0.

in → mm

Inches to Millimeters

1 inch (in) is equal to 25.

Calculators & references

BMR · TDEE

Daily Calorie Calculator

Mifflin-St Jeor BMR & TDEE with weight-loss and lean-gain targets.

Reference

US Coin Weight Chart

Penny 2.5 g · nickel 5 g · quarter 5.67 g — plus scale-calibration combos.

Don't know the weight yet?

Scale for Grams estimates any object's weight from a single photo — then converts it to grams, kilograms, pounds and ounces automatically.

Weigh with a photo