Calculators
Everyday calculators in one place: loans and compound interest, pay and hours, dates and countdowns, percentages, fractions and statistics. (41 tools)
Finance & Tax
Stock Average
Average down calculator
Stock Return
P/L with fees & taxes
Margin Calculator
Profit margin, markup & price
Break-even Calculator
Units & sales to break even
Loan Calculator
Monthly payment and total interest
Compound Interest
Investment growth with monthly contributions
Savings Interest
After-tax payout
Pay & Work
Date & Time
Days Until Christmas
live countdown to Dec 25
New Year Countdown
time left until New Year
Lunar Calendar
Monthly calendar with lunar dates
Age Calculator
Exact age in years, months, days from birth date
D-Day Calculator
Countdown to date, days between dates
Time Zone Converter
World time & DST
Week Number
What week is it
Day of Year
What day of the year
Time Sum
Add time ranges
Shift Schedule
Next work day
Time Calculator
What time X min/hours from now? 36 presets
Lunar Converter
Convert lunar and solar dates
Math & School
Square Root & Log
Roots · powers · logs
Statistics Calculator
Mean · median · std. dev
Ratio Calculator
Proportions & splits
Prime Factorization
GCF · LCM · primes
Area & Volume Calculator
Shapes and solids
Triangle Calculator
Pythagoras, SSS, SAS, ASA
Roman Numeral Converter
Numbers ↔ Roman numerals
Fraction Calculator
Add · subtract · simplify
Percentage Calculator
Percentages, change, increase/decrease
Everyday Math
Will It Fit Calculator
door, elevator & car trunk
Electricity Bill
kWh usage × rate
AC Electricity Cost
BTU/watts to $/month
Discount Calculator
Sale price and discount percentage
Download Time Calculator
File size & speed
Tip Calculator
Calculate tip and split the bill
Camping Food
Food per person
Food Quantity
Servings per person
Split the Bill
1/N with drinks