Water Boiling Time Calculator
Estimate how long it takes to boil water based on volume, starting temperature, altitude, and heat source power.
Time to Boil
Water boiling time depends on volume, starting temperature, altitude, and heat source power.
Energy needed (BTU) = Weight (lbs) × Temperature Rise (°F)
Time = Energy Needed / Burner Output (adjusted for efficiency)
Heat source power:
- Electric kettle (1500W): ~5,100 BTU/hr
- Standard gas burner: 7,000–9,000 BTU/hr
- Power gas burner: 12,000–18,000 BTU/hr
- Induction cooktop: ~10,000–12,000 BTU/hr
Altitude effects on boiling point:
- Sea level: 212°F (100°C)
- 5,000 ft (1,524 m): 203°F (95°C)
- 7,500 ft (2,286 m): 198°F (92°C)
- 10,000 ft (3,048 m): 194°F (90°C)
Quick reference (1 quart / ~1 liter):
- Electric kettle: 3–4 minutes
- Gas stove (medium-high): 5–7 minutes
- Microwave: 3–5 minutes
Rule of thumb: Doubling the volume approximately doubles the boiling time.