Calculators by country
kWhmate — electricity & everyday calculators by country
Up-to-date electricity bill, LED savings and everyday calculators, built on each country's official rates.
Choose your country
🇰🇷 한국 (Korea)
전기요금 · 가전 전기요금 · 난방기 전기요금 · 가전별 요금표 · LED 절약 · SMPS 용량
🇹🇼 台灣 (Taiwan)
電費計算機 · LED 省電計算機
🇵🇭 Philippines
Meralco bill calculator · LED savings
🇯🇵 日本 (Japan)
電気料金計算機（東京電力）· LED節約
More countries are on the way.
How kWhmate works
Pick your country, enter the kWh from your bill (or the watts and hours of an appliance or light), and the calculator applies that utility’s published tariff step by step. Everything runs in your browser; there is no sign-up and the calculators are free.
Where the numbers come from
| Country | Tariff used | How often we check it |
|---|---|---|
| Korea | KEPCO residential low-voltage tariff | Fuel-cost adjustment every quarter; whenever the tariff is revised |
| Taiwan | Taipower residential tiered tariff | After each rate review (March and September) |
| Philippines | Meralco residential rates | Every month, after Meralco’s announcement |
| Japan | TEPCO “Juryo Dento B” + national renewable levy | Fuel-cost adjustment every month; levy every fiscal year |
Each calculator page shows its rate table, the date the rates apply from and a link to the official source, plus a worked example you can follow by hand. Read more about our editorial policy and corrections.