TL;DR — type once, see every equivalent unit (plus live currency)
This free unit converter turns one input into a full table of equivalents across your chosen category—length, weight, temperature, area, volume, speed, time, power, pressure, angle, or data size. Prefer a streamlined layout? Use Focus Mode for From → To with multiple outputs. The Currency tab fetches live exchange rates on demand (Frankfurter API). Fast, precise, private, and 100% client‑side.
Advanced Unit & Currency Converter — instant tables, Focus Mode, and live FX
Skip the spreadsheets and pocket charts—this all‑in‑one unit & currency converter focuses on speed and clarity. Enter a value next to any unit (e.g., cm or kg) and the entire table fills with precise equivalents for that category. It’s perfect for everyday conversions like kg to lbs, cm to inches, mm to inches, km to miles, or °C to °F, and it extends to area, volume, speed, time, power, pressure, angle, and data size. For currency, open the dedicated tab to fetch the latest available exchange rates via the Frankfurter API.
Want a minimal, side‑by‑side layout? Switch to Focus Mode. Choose a single From unit, then add multiple To rows to compare results (for example, inch → cm and inch → mm in one view). You can click any row in the full table to make it the active input—the app re‑expresses your current number in that unit automatically. The input accepts comma or dot as the decimal separator, and outputs are formatted with sensible precision so you can copy results without cleanup.
Temperature conversions use the standard formulas—°F = °C × 9/5 + 32 and °C = (°F − 32) × 5/9—and common constants are built in so quick checks stay consistent: 1 inch = 25.4 mm, 1 kg ≈ 2.20462 lb, 1 km ≈ 0.621371 mi. Because the app runs entirely in your browser, most conversions work offline; currency rates simply load on demand when you open the FX tab. No accounts, no uploads, just fast, accurate math.
How to use this converter
- Pick a category: Length, Weight, Temperature, Area, Volume, Speed, Time, Power, Pressure, Angle, Data, or Currency.
- Enter a value next to any unit: the table instantly shows every equivalent.
- Focus Mode (optional): choose a From unit and add multiple To outputs for side‑by‑side comparisons.
- Temperature & currency: use °C/°F/K for heat; open the Currency tab to fetch live FX rates.
- Copy and continue: switch units anytime—the current input is converted for you.
Key features
- Live, all‑units table per category (type once, see every equivalent instantly)
- Focus Mode for streamlined From → To with multiple outputs
- Temperature conversions: Celsius ↔ Fahrenheit ↔ Kelvin
- Length favorites: cm ↔ in, mm ↔ in, km ↔ mi, ft ↔ m
- Weight favorites: kg ↔ lb, oz ↔ g, st ↔ kg
- Accurate Area, Volume, Speed, Time, Power, Pressure, Angle, and Data size conversions
- Currency tab with live exchange rates (Frankfurter API) on demand
- Decimal normalization (comma or dot), smart precision formatting
- Fast, privacy‑friendly, 100% client‑side — no sign‑up
Tips
- Use either comma or dot for decimals; the converter normalizes automatically.
- Click any row in table view to make it the active input — your value is re‑expressed in that unit.
- In Focus Mode, add multiple “To” rows to compare units side‑by‑side (e.g., in → cm and mm).
- Quick temperature math: °F = °C × 9/5 + 32; °C = (°F − 32) × 5/9.
- For distance: 5 km ≈ 3.10686 mi; for weight: 10 kg ≈ 22.0462 lb.
Frequently asked questions
How many millimeters are in an inch?
What is 1 kg in pounds (kg to lbs)?
How do I convert centigrade (°C) into Fahrenheit (°F)?
°F = °C × 9/5 + 32. Example: 20°C → 68°F. Reverse: °C = (°F − 32) × 5/9.What’s the quick rule for kilometers to miles?
Are currency exchange rates live?
Related tools
Percentage Calculator · Time Duration Calculator · Advanced Text Cleaner
Last updated: Aug 25, 2025