Tools

Everyday tools

Tools for everyday preparation, shopping, and quick calculations.

Split bill

Split Bill Calculator

Split a total amount by the number of people and round each share by 1, 10, or 100 yen.

Tax

Calculate Japanese before-tax, after-tax, and consumption tax amounts for 8% and 10% rates.

BMI

Calculate your BMI (Body Mass Index) and ideal weight from your height and weight, and see your weight category.

Discount

Calculate the final price and your savings from the original price and discount rate (%) or amount.

Packing list

Create a starter packing checklist for travel, business trips, hospital stays, or going out with kids, then add items and copy the list.

Measure converter

Convert between tablespoons, teaspoons, cups, and grams for common ingredients like water, sugar, salt, and soy sauce.

Area Converter

Instantly convert between square meters (m²), tsubo, and jyo (tatami mats). You can also choose tatami size standards like Chukyo-ma and Edo-ma.

Area Table

A quick reference table for jyo (tatami mats), square meters (m²), and tsubo. Perfect for checking room sizes when apartment hunting.