---
title: "Japan Calculators — BMI, Mortgage, Consumption Tax, Yen Converter"
description: "Free calculators for Japan in English. JASSO BMI standard (25=obese), mortgage at 0.5% (world's lowest), consumption tax 10%/8%, JPY currency converter, and more."
url: "https://worldcalculators.org/jp/"
canonical: "https://worldcalculators.org/jp/"
---

# Japan Calculators

Free calculators for Japan in English. JASSO BMI standard (25=obese), mortgage at 0.5% (world's lowest), consumption tax 10%/8%, JPY currency converter, and more.

## Japan uses different standards than the rest of the world

The same number means something different in Japan. Here's what to know.

## Why Japan's calculators are different

Japan is an outlier in several measurement systems, which matters if you're moving to Japan, working there, or comparing Japanese health metrics:
The WHO classifies overweight at BMI ≥25 and obese at BMI ≥30. Japan's obesity medical association (JASSO) classifies overweight at BMI ≥23 (same as Asia-Pacific guideline) and obese starting at BMI ≥25 — where the WHO says "normal weight" continues to 29.9.

Source: https://worldcalculators.org/jp/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.