Energy Unit Converter
Convert between joules, kilowatt-hours, calories, BTU, electron volts, and more — with step-by-step formula.
⚡ Energy
Result
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When to use: kWh is used for electricity billing and EV battery
capacity. Joules are the SI base unit used in physics. BTU is common in HVAC. kcal = 1 food calorie.
Common Uses
🔌 EV battery 75 kWh ≈ 270 MJ
🍎 1 food calorie = 1 kcal = 4,184 J
💡 100W bulb for 1hr = 0.1 kWh = 360 kJ
🏠 Avg US home: ~10,500 kWh/year
Quick Reference
| From | Factor | To |
|---|---|---|
| 1 kWh | 3,600,000 | Joules |
| 1 BTU | 1,055.06 | Joules |
| 1 kcal | 4,184 | Joules |
| 1 eV | 1.602e-19 | Joules |
| 1 kJ | 0.9478 | BTU |
Data Transfer Rate Converter
Convert between Mbps, MB/s, Gbps, GB/s, Kbps, and more. Essential for understanding internet speeds.
📡 Data
Result
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Key fact: 1 byte = 8 bits. Internet speeds are in bits/s
(Mbps). File sizes are in bytes (MB). A 100 Mbps connection downloads at ≈12.5
MB/s — just divide by 8.
Download time estimator
÷
Time
80 s
Real-world speeds
📶 4G LTE avg: ~20–50 Mbps
📱 5G peak: up to 1 Gbps
🏠 Fiber home: 100–1000 Mbps
💾 USB 3.0: 5 Gbps
🌐 Netflix 4K needs: ~25 Mbps
Quick Reference
| Unit | = bits/s | Type |
|---|---|---|
| 1 Kbps | 1,000 | bits |
| 1 Mbps | 1,000,000 | bits |
| 1 Gbps | 1,000,000,000 | bits |
| 1 KB/s | 8,000 | bytes |
| 1 MB/s | 8,000,000 | bytes |
Torque Converter
Convert between Newton-metres, pound-feet, pound-inches, kilogram-force metres, and dyne-centimetres.
🔩 Torque
Result
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When to use: Nm is the SI standard for global car specs. lb·ft is
common in US automotive. Engine torque at the crankshaft differs from wheel torque after gearbox
reduction.
Typical car torque
🚘 Economy car: ~100–150 Nm
🚙 Mid-size SUV: ~250–350 Nm
🏒 Sports car: ~400–600 Nm
⚡ Tesla Model S: 931 Nm
Quick Reference
| From | × Factor | = Nm |
|---|---|---|
| 1 lb·ft | 1.35582 | Nm |
| 1 lb·in | 0.11298 | Nm |
| 1 kgf·m | 9.80665 | Nm |
| 1 Nm | 0.73756 | lb·ft |
Fuel Efficiency Converter
Convert between MPG, L/100km, km/L, and MPG Imperial. Compare US, European, and EV vehicle specs.
⛽ Fuel
Result
—
Note: L/100km and MPG are inversely proportional — higher MPG = lower
L/100km = more efficient. US gallon = 3.785 L. Imperial gallon = 4.546 L.
Trip cost estimator
Cost
$60.00
Quick Reference
| MPG (US) | L/100km | km/L |
|---|---|---|
| 15 | 15.68 | 6.38 |
| 20 | 11.76 | 8.50 |
| 30 | 7.84 | 12.75 |
| 40 | 5.88 | 17.00 |
| 50 | 4.70 | 21.25 |
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine — with the exact formula shown each time.
🌡️ Temp
Result
—
Key references: Water freezes at 0°C / 32°F / 273.15 K. Water boils
at 100°C / 212°F / 373.15 K. Absolute zero = 0 K = −273.15°C.
All scales at once
Landmark temperatures
| °C | °F | What |
|---|---|---|
| −273.15 | −459.67 | Absolute zero |
| −40 | −40 | C° = F° crossover |
| 0 | 32 | Water freezes |
| 20 | 68 | Room temp |
| 37 | 98.6 | Body temp |
| 100 | 212 | Water boils |
| 180 | 356 | Baking (cake) |
| 232 | 450 | Tin melts |
| 660 | 1,220 | Aluminium melts |
| 1,064 | 1,947 | Gold melts |
Frequently asked questions
Common questions about unit conversions and how this tool works.