⚡ Japan Electricity Bill Calculator (kWh / Watt to JPY ¥)
Calculate how much your air conditioner, heater, gaming PC, or refrigerator costs in Japan based on the reference rate (31 JPY / kWh) or regional rates by utility area.
Estimate in JPY
Estimated Monthly Cost (30 Days)
¥4,464
Cost per Hour
¥18.6
24/7 Continuous (Monthly)
¥13,392
🏠 Japan Apartment Size Converter: Tatami (Jō) ⇄ m² ⇄ sq.ft
Japanese real estate listings measure rooms in Tatami mats (Jō, 1 Jō = 1.62 m²) and Square Meters (m²). Enter the area below to convert to Square Feet (sq.ft) and estimate move-in costs:
Area & Move-In Estimate
Square Feet (sq.ft)
269 sq.ft
Tatami Mats (Jō)
15.4 Jō
Tsubo (坪)
7.56 Tsubo
Typical Move-In Cost (4.5x Rent)
¥360,000
📡 Japan Fiber Internet Speed & Monthly Data (GB) Calculator
Check whether your apartment internet speed (Mbps / Ping) is fast enough for remote work (Zoom/Teams), 4K streaming, or online gaming in Japan:
Connection Quality Verdict
Excellent (Ready for 4K & Gaming)
Important Disclaimer: All calculations are reference estimates based on an industry reference rate (31 JPY/kWh, Japanese trade association benchmark) and standard real estate conversion rules (1 Jō = 1.62 m²). Please verify the latest pricing, campaigns, and contract terms on the official websites of each utility or service provider.
📋 All 33 Specialized Japan Expat Calculators (Electricity, Tatami/m² & Internet)
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Frequently Asked Questions (FAQ)
Q. How is electricity calculated in Japan?
A. In Japan, household electricity is billed per kWh. The national benchmark rate is 31 JPY per kWh (1,000W used for 1 hour = 1 kWh = 31 JPY).
Q. How many square feet is 1 Tatami mat (1 Jō) in Japan?
A. Under Japan's Real Estate Fair Competition Code, 1 Tatami mat (1 Jō) equals 1.62 square meters (approx. 17.44 sq.ft). A 25 m² 1K apartment is roughly 269 sq.ft.