The Ultimate Unit Conversion Cheat Sheet for 2026
Whether you're cooking, traveling, exercising, or working on a project, you'll inevitably need to convert between measurement units. Here's your go-to reference.
Length Conversions
| From | To | Multiply By |
|---|---|---|
| Inches | Centimeters | 2.54 |
| Feet | Meters | 0.3048 |
| Yards | Meters | 0.9144 |
| Miles | Kilometers | 1.6093 |
| Centimeters | Inches | 0.3937 |
| Meters | Feet | 3.2808 |
| Kilometers | Miles | 0.6214 |
Quick mental math: 1 inch ≈ 2.5 cm | 1 mile ≈ 1.6 km | 1 meter ≈ 3.3 feet
Weight Conversions
| From | To | Multiply By |
|---|---|---|
| Pounds (lbs) | Kilograms (kg) | 0.4536 |
| Kilograms | Pounds | 2.2046 |
| Ounces | Grams | 28.3495 |
| Grams | Ounces | 0.0353 |
| Stones | Kilograms | 6.3503 |
Quick mental math: 1 kg ≈ 2.2 lbs | 1 lb ≈ 0.45 kg | 1 oz ≈ 28 g
Temperature Conversions
The temperature formulas you need to know:
• Celsius to Fahrenheit: °F = (°C × 9/5) + 32
• Fahrenheit to Celsius: °C = (°F – 32) × 5/9
• Celsius to Kelvin: K = °C + 273.15
Key Reference Points
| °C | °F | Context |
|---|---|---|
| 0 | 32 | Water freezes |
| 20 | 68 | Room temperature |
| 37 | 98.6 | Body temperature |
| 100 | 212 | Water boils |
| 180 | 356 | Oven baking |
Volume Conversions
| From | To | Multiply By |
|---|---|---|
| Liters | US Gallons | 0.2642 |
| US Gallons | Liters | 3.7854 |
| Cups | Milliliters | 236.588 |
| Tablespoons | Milliliters | 14.787 |
| Fluid Ounces | Milliliters | 29.574 |
Speed Conversions
| From | To | Multiply By |
|---|---|---|
| MPH | KPH | 1.6093 |
| KPH | MPH | 0.6214 |
| Knots | KPH | 1.852 |
| Knots | MPH | 1.151 |
Digital Storage
| Unit | Equals |
|---|---|
| 1 KB | 1,024 Bytes |
| 1 MB | 1,024 KB |
| 1 GB | 1,024 MB |
| 1 TB | 1,024 GB |
Quick reference: A typical photo is 3-5 MB. A movie is 1-4 GB. A full iPhone is 64-512 GB.
Pro Tips
1. Bookmark a converter — Our Unit Converter handles all these instantly
2. Learn the common ones — Memorize the top 5 conversions you use most
3. Use approximate ratios — For quick mental math, round to easy numbers
4. Watch for UK vs US — A US gallon (3.785 L) is different from an imperial gallon (4.546 L)
Use our free Unit Converter to apply what you have learned.
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