Clockulator
ProductivityMaster Every Time Calculation
Add and subtract hours, minutes, and seconds in a tap, plus 40+ time utilities for countdowns, time zones, pay rates, and more.
Total Hours, Minutes & Pay
Type real durations in hours, minutes, and seconds, then see your total instantly with the dollar amount based on your hourly rate.
Dozens of Custom Themes
Switch between light, dark, and colorful calculator themes to match your style. From Classic to Midnight, Cyber Punk to Atomic Age, there is one for every mood.
See Every Step Explained
Tap the breakdown button to reveal every operation in your calculation, step by step. Verify your work, catch errors, and understand exactly how your total was reached.
40+ Built-In Time Tools
Beyond the calculator, access tools for countdowns, date spans, workday counters, age calculators, time zone converters, pace calculators, and much more — all searchable in one place.
Searchable Calculation History
Every calculation is saved automatically and grouped by date. Search, revisit, or copy any past result whenever you need it again.
Swap Themes in One Tap
Browse light and dark theme collections with live previews. Pick from warm, cool, retro, and modern palettes — your choice is saved automatically.
Tap to Edit Any Value
Made a mistake? Tap any operand in your expression to edit it inline. Adjust hours, minutes, or seconds without starting over, then save or delete the value.
Personalize Every Detail
Set your preferred format, keypad placement, accent color, home screen icon, language, and currency. Make Clockulator feel like it was built just for you.
