Free Aviation Tool
Aviation Unit Converter
Convert speed, altitude, weight, temperature, pressure and fuel volume instantly. Built for pilots, students and aviation enthusiasts.
🔄 Unit Converter
Speed · Altitude · Weight · Temperature · Pressure · Volume
Simple 3 steps
How It Works
No sign-up required. Select a category, enter your value and get instant results across all units.
Pick a Category
Choose from six unit categories — Speed, Altitude, Weight, Temperature, Pressure or Volume using the tabs.
Enter Your Value
Type any number and select what unit you are converting from. Results appear instantly as you type.
Read All Conversions
All converted values are shown at once so you never have to convert the same number twice.
Quick reference
Common Conversions
Frequently used aviation unit conversions for quick reference in the cockpit or classroom.
| From | Value | Knots (kts) | km/h | mph | m/s |
|---|---|---|---|---|---|
| 1 Knot | 1 kts | 1.000 kts | 1.852 km/h | 1.151 mph | 0.514 m/s |
| Mach 1 | 1.0 M | 661.5 kts | 1,225 km/h | 767.3 mph | 340.3 m/s |
| Typical cruise | 450 kts | 450 kts | 833.4 km/h | 517.9 mph | 231.5 m/s |
| From | Value | Feet (ft) | Metres (m) | Nautical Miles | Kilometres |
|---|---|---|---|---|---|
| 1,000 ft | 1,000 ft | 1,000 ft | 304.8 m | 0.165 NM | 0.305 km |
| FL100 | 10,000 ft | 10,000 ft | 3,048 m | 1.646 NM | 3.048 km |
| FL350 | 35,000 ft | 35,000 ft | 10,668 m | 5.765 NM | 10.668 km |
| Reference | Celsius (°C) | Fahrenheit (°F) | Kelvin (K) | hPa | inHg |
|---|---|---|---|---|---|
| ISA Sea Level | 15 °C | 59 °F | 288.15 K | 1013.25 hPa | 29.92 inHg |
| Freezing point | 0 °C | 32 °F | 273.15 K | — | — |
| FL350 ISA temp | -54.3 °C | -65.7 °F | 218.85 K | 238.4 hPa | 7.04 inHg |
About this tool
Accurate & Free
This aviation unit converter covers all the essential unit categories used in flight operations, navigation, and aircraft performance. Whether you need to convert cruise speed from knots to km/h, check cabin altitude in metres, or verify QNH in both hPa and inHg — everything is in one place.
All conversions use standard aviation and ICAO-recognised formulas. The tool is designed for pilots, student pilots, aviation enthusiasts, dispatchers, and anyone working in or studying the aviation industry.
- 6 unit categories in one tool
- Speed — knots, km/h, mph, Mach, m/s
- Altitude — feet, metres, NM, km, miles
- Temperature — Celsius, Fahrenheit, Kelvin
- Pressure — hPa, inHg, mb, PSI, Pa
- Volume — litres, US gallons, Imp gallons, kg
- Instant results as you type
- No sign-up or account needed
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