日常計算機

Practical daily-life math — fuel, electricity, shopping, downloads, sleep and study, solved in one click.

燃料費計算機

Trip distance (km) Fuel efficiency (km per litre) Fuel price (per litre)

Estimate what a road trip will cost in fuel from distance, consumption and pump price.

Distance driven (km) Fuel used (litres)

Measure your real fuel economy in km/L, L/100km and US MPG from one fill-up.

Appliance power (W) Hours used per day Price per kWh

See what any appliance costs to run per day, month and year from its wattage.

Product A price Product A quantity Product B price Product B quantity

Compare two pack sizes by price per unit and instantly see which is the better deal.

File size (MB) Connection speed (Mbps)

Estimate how long a file will take to download at your internet speed.

Wake-up time (HH:MM)

Find bedtimes that complete full 90-minute sleep cycles so you wake up refreshed.

Battery capacity (mAh) Charger current (mA)

Estimate how long a battery takes to charge, both ideal and with typical losses.

Grade points (e.g. 4, 3, 2) Credits (e.g. 3, 3, 2)

Compute a credit-weighted grade point average from your course grades and credit hours.