No. Every conversion is computed locally in your browser with JavaScript. No values are sent to, or stored on, our servers.
Free Business Tool — 100% In-Browser
Unit Converter
Convert length, weight, temperature, area, volume, speed, data, time, pressure and energy units instantly. Live results, full conversion tables, and a printable reference — all computed in your browser. Nothing is uploaded.
- ✔ 10 categories
- ✔ Metric & imperial
- ✔ Exact standard factors
- ✔ Full all-units table
- ✔ Print & export
- ✔ Free Forever
Every Conversion You Need, Computed Entirely on Your Machine
Metric or imperial, cooking or engineering, hosting or hardware — everyone ends up converting units against a half-remembered factor. Most online converters bury the result in ads or silently round it; this one gives you the exact standard factor (1 inch = 25.4 mm, by definition, not approximation), live results as you type, and a one-click table of your value in every unit of the category.
Nothing is uploaded: every calculation runs in your browser, which is why the tool is instant, free and needs no account. Print the full conversion table or export it as TXT / JSON — handy for shop floors, kitchens and server rooms alike.
How It Works
1. Pick a Category
Length, weight, temperature, area, volume, speed, data, time, pressure or energy — one dropdown.
2. Enter Your Value
Type any number and choose the From and To units — the result updates live as you type.
3. Swap & Refine
One click swaps the units; pick your decimal precision, from 2 places to fully automatic.
4. Copy, Print or Export
Copy the result, or print and export the full All-Units table as TXT or JSON. Zero uploads.
Unit Converter
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Enter a value to convert
The value from the Convert tab is converted to every unit in the selected category. Print it as a reference sheet or export it as TXT / JSON.
| Unit | Value |
|---|
Unit Conversion Guide
Quick reference for the conversions people look up most often. The converter uses exact standard factors — the table below is a mental-math shortcut.
| Category | Handy facts |
|---|---|
| Length | 1 in = 25.4 mm exactly · 1 ft = 30.48 cm · 1 m = 3.2808 ft · 1 mile = 1.609344 km · 1 nautical mile = 1.852 km |
| Weight / Mass | 1 kg = 2.20462 lb · 1 lb = 453.592 g · 1 oz = 28.3495 g · 1 stone = 6.35029 kg · 1 tonne = 1000 kg |
| Temperature | °F = °C × 9⁄5 + 32 · °C = (°F − 32) × 5⁄9 · K = °C + 273.15 |
| Area | 1 hectare = 10,000 m² = 2.47105 acres · 1 acre = 4,046.86 m² · 1 km² = 0.386102 sq mi |
| Volume | 1 litre = 33.814 US fl oz · 1 US gallon = 3.78541 L · 1 UK gallon = 4.54609 L · 1 cup (US) = 236.588 ml |
| Speed | 1 km/h = 0.621371 mph · 1 m/s = 3.6 km/h · 1 knot = 1.852 km/h · 1 mph = 1.46667 ft/s |
| Data storage | KB = 1000 B (decimal), KiB = 1024 B (binary) · 1 MB = 1000 KB · 1 GiB = 1024 MiB · drive makers use decimal, OSes often use binary |
| Time | 1 day = 86,400 s · 1 week = 7 days · month = 30.436875 days (average) · year = 365.2425 days (Gregorian average) |
| Pressure | 1 bar = 100,000 Pa · 1 atm = 101,325 Pa · 1 psi = 6,894.76 Pa · 1 mmHg (torr) = 133.322 Pa |
| Energy | 1 kWh = 3.6 MJ · 1 cal = 4.184 J · 1 kcal (food Calorie) = 4.184 kJ · 1 Wh = 3600 J |
Frequently Asked Questions
Is my data uploaded anywhere?
Why do KB and KiB give different results?
Decimal prefixes (KB, MB, GB) are powers of 1000; binary prefixes (KiB, MiB, GiB) are powers of 1024. Storage manufacturers usually quote decimal sizes while operating systems often report binary sizes — the converter includes both so you can compare fairly.
How accurate are the conversions?
The converter uses exact internationally standard factors (for example, 1 inch = 25.4 mm and 1 pound = 453.59237 grams by definition). Results are rounded only for display, based on the decimal-places setting.
Can I print a full conversion table?
Yes. Switch to the All Units Table tab and click Print — a clean, printer-friendly sheet with your value converted to every unit in the category is generated.
Is it free to use?
Yes — 100% free, with no sign-up, no limits and no watermarks. Bookmark it for your next conversion.