Unit Converters
Conversions
Unit converters
Shared conversion engine for common units with on-page math, explanations, and FAQs.
A collection of unit converters for distance, weight, temperature, area, and speed—fully client-side and fast.
What this hub does
This hub groups unit converters that run entirely in your browser. Each converter uses a shared engine with clear formulas and examples so you can perform conversions quickly without network calls or data sharing.
Common conversions people look up
Everyday needs include converting cm to inches or feet and miles to kilometres (length), kg to pounds and grams to ounces (weight), Celsius to Fahrenheit (temperature), square metres to square feet or acres (area), and km/h to mph (speed). Each converter shows the formula it uses and works in both directions, so you can go from metric to imperial or back instantly — useful for recipes, travel, fitness, DIY projects, and schoolwork.
Conversion factors worth memorising
| From | To | Multiply by |
|---|---|---|
| Inches | Centimetres | 2.54 |
| Miles | Kilometres | 1.609 |
| Kilograms | Pounds | 2.205 |
| Ounces | Grams | 28.35 |
| Acres | Square metres | 4,047 |
| km/h | mph | 0.621 |
Temperature is the exception — it needs an offset, not just a multiplier: °F = (°C × 9/5) + 32, and Kelvin = °C + 273.15.
A note on rounding
These converters use full-precision factors and round only the displayed result, so you will not see the drift that comes from chaining rounded intermediate values. For everyday use — cooking, travel, fitness, DIY — the displayed precision is more than enough. For engineering, scientific, legal, or trade purposes where tolerances matter, work from the exact factor and apply your own rounding rules at the end.