Calculator Online Tools

Percent Calculator

Calculate percentages easily

Unit Price Calculator

Calculate unit prices to find the best deal instantly

Japanese Era / Western Year Converter

Convert Japanese Era to Western year and vice versa with age, zodiac & more

BMI Calculator

Calculate BMI with ideal weight comparison, body fat estimation & trend graph

Age Calculator

Calculate age, zodiac, milestone years, and more from your birthday

Electricity Cost Calculator

Calculate electricity costs for appliances with multi-device totals and replacement savings

Date Calculator

Calculate date ranges, business days & add/subtract dates with JP holiday support

Anniversary Calculator

Calculate days since any date with milestone anniversaries (100, 1000, 10000 days)

Time Calculator

Calculate time differences, add/subtract, and track work hours

Countdown Timer

Real-time countdown showing days, hours, minutes & seconds until your target date

Days Counter

Calculate days between two dates instantly with business days & Japanese era

Date After/Before Calculator

Calculate dates X days after or before any date with presets and batch comparison

Weeks Calculator

Calculate weeks between dates instantly with reverse date lookup from weeks

Day of Week Calculator

Instantly find the day of the week for any date with calendar and zodiac info

Calorie & PFC Balance Calculator

Calculate BMR, TDEE & PFC balance with 4 formulas comparison and 7 presets