Document your conversion formulas here.
Measurement Conversion Formulas
Understanding the math behind a conversion helps you double-check results and apply them confidently — even without a calculator. Below are the core formulas for each major measurement category.
Length Formulas
| Conversion |
Formula |
| Inches to Centimeters |
cm = in × 2.54 |
| Centimeters to Inches |
in = cm ÷ 2.54 |
| Feet to Meters |
m = ft × 0.3048 |
| Meters to Feet |
ft = m ÷ 0.3048 |
| Miles to Kilometers |
km = mi × 1.60934 |
| Kilometers to Miles |
mi = km ÷ 1.60934 |
Weight Formulas
| Conversion |
Formula |
| Pounds to Kilograms |
kg = lb × 0.453592 |
| Kilograms to Pounds |
lb = kg ÷ 0.453592 |
| Ounces to Grams |
g = oz × 28.3495 |
| Grams to Ounces |
oz = g ÷ 28.3495 |
Volume Formulas
| Conversion |
Formula |
| Liters to Gallons |
gal = L × 0.264172 |
| Gallons to Liters |
L = gal ÷ 0.264172 |
| Cups to Milliliters |
ml = cups × 236.588 |
| Milliliters to Cups |
cups = ml ÷ 236.588 |
Temperature Formulas
| Conversion |
Formula |
| Celsius to Fahrenheit |
°F = (°C × 9/5) + 32 |
| Fahrenheit to Celsius |
°C = (°F − 32) × 5/9 |
| Celsius to Kelvin |
K = °C + 273.15 |
| Kelvin to Celsius |
°C = K − 273.15 |
Area Formulas
| Conversion |
Formula |
| Square Feet to Square Meters |
m² = ft² × 0.092903 |
| Square Meters to Square Feet |
ft² = m² ÷ 0.092903 |
| Acres to Square Meters |
m² = acres × 4046.86 |
| Square Meters to Acres |
acres = m² ÷ 4046.86 |
Time Formulas
| Conversion |
Formula |
| Minutes to Hours |
hr = min ÷ 60 |
| Hours to Minutes |
min = hr × 60 |
| Days to Hours |
hr = days × 24 |
| Hours to Days |
days = hr ÷ 24 |
Why Formulas Matter
While our Converters give you instant results, knowing the formula behind a conversion is useful when:
- You don’t have internet access and need to calculate manually
- You want to verify a result for accuracy
- You’re learning the relationship between units for school or work
- You need to apply the formula to a custom or unusual value
Explore More