Tools
Everyday tools
Tools for everyday calculations such as bill splitting, tax, discounts, BMI, wages, packing lists, cooking measures, and room area.
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All tools
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
Japan Consumption Tax Calculator (8% / 10%)
Calculate Japanese consumption tax, before-tax prices, after-tax prices, and tax amounts for Japan tax rates of 8% and 10%.
BMI
BMI Calculator
Calculate your BMI (Body Mass Index) and ideal weight from your height and weight, and see your weight category.
Discount
Discount Calculator: Percent Off and Sale Price
Calculate a sale price from a percent off and see the savings. Find the discount rate from an original and sale price.
Unit price
Unit Price Comparator: Price per 100 g, 100 mL, or Piece
Compare two or three products by price per 100 g, per 100 mL, or per piece, and add shipping and coupons to compare the effective price.
Packing list
Packing Checklist Maker
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
Cooking Measure Converter
Convert between tablespoons, teaspoons, cups, and grams for common ingredients like water, sugar, salt, and soy sauce.
Tsubo & Tatami
Tsubo to Square Meters & Tatami to m² Converter
Convert between tsubo, square meters (m²), and tatami mats. Check tsubo to sqm, tatami to m2, and Japanese tatami size standards.
m² to Tatami
Square Meters to Tatami Reference Table
6 tatami mats are 9.72 m² at 1.62 m² each. Compare common tsubo, square meter, and tatami sizes, or convert a value that is not in the table.
Hourly Wage
Hourly Wage Converter
Convert between hourly wage, monthly salary, and yearly salary estimates using work hours and working days.
Compound interest
Compound Interest Calculator
Calculate a future value and the interest from a principal, annual rate, and period in years. You can add monthly deposits. This is not tax or product advice.