Unit Conversion Done Right: Practical Guide
2026-08-11
Unit Conversion Done Right: Practical Guide
Conversion mistakes can ruin recipes, reports, or endanger lives in some professions — learn the basics once, use them forever.
Length Conversions
| From | To | Multiply by |
|---|---|---|
| cm | m | ÷ 100 |
| m | ft | × 3.2808 |
| inch | cm | × 2.54 |
| km | mi | ÷ 1.609 |
Weight Conversions
| From | To | Multiply by |
|---|---|---|
| g | kg | ÷ 1000 |
| kg | lb | × 2.2046 |
| lb | kg | ÷ 2.2046 |
Temperature
- °C → °F: (°C × 9/5) + 32
- °F → °C: (°F − 32) × 5/9
Cautions
- Length/weight use simple ratios (easy)
- Temperature needs formulas (different zero points — never just multiply!)
- Match units before calculating (convert cm to m first)
Convert Instantly
Use our Unit Converter — length, weight, temperature in one place. Free.