Energy and Travel calculators
Electricity cost, appliance running cost, fuel cost, and travel time.
Energy and Travel tools
Use these calculators for general informational estimates and simple arithmetic. Check the formula, units, examples, and limitations on each calculator page before relying on a result.
Electricity cost calculator
Calculate electricity cost from watts, usage time, days, standby power, rate, and fixed fees.
Appliance running cost calculator
Estimate appliance running cost from wattage, duty cycle, daily runtime, standby power, days, and electricity rate.
Fuel cost calculator
Estimate fuel needed, fuel cost, round trip cost, shared cost, tolls, and parking.
Travel time calculator
Estimate travel time with distance, speed, stops, buffer, and optional departure time.
How to use this category
- Choose the calculator that matches the task and units you have.
- Enter realistic values from your receipt, recipe, schedule, room measurement, appliance label, or trip plan.
- Read the visible formula, result breakdown, and assumptions before using the estimate.
Related categories
Estimate boundaries
These tools do not replace qualified professional review. Use them for transparent arithmetic, quick checks, and low-stakes planning only.