ReferenceMay 29, 2026• 4 min read
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)
📖 Recommended Reading
✍️ Written by the GlobalUtilityHub Editorial Team|📅 Last reviewed: May 2026|✓ Fact-checked for accuracy
Frequently Asked Questions
The US uses the Imperial system (inches, pounds, Fahrenheit) primarily due to historical inertia. While most of the world adopted the Metric system, the cost and effort of switching for a country of 330 million people has prevented the change.
For a quick estimate: double the Celsius value and add 30 to get approximate Fahrenheit. For example, 20°C → (20×2)+30 = 70°F (actual: 68°F). Close enough for everyday use.
No. A UK (Imperial) pint is 568 mL, while a US pint is only 473 mL. This roughly 20% difference applies to gallons and other volume measures too.
Move the decimal point 3 places for each step: kilo (×1000) → base unit → milli (÷1000). For example: 1 kilometer = 1,000 meters = 1,000,000 millimeters.