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Everyday & Lifestyle · 14 calculators

Everyday Calculators

Tips, bill and expense splits, cost per person, countdowns, anniversaries, time since and until, and price comparisons.

Key everyday formulas

TipTip = bill × %; each = (bill + tip) ÷ people
Split BillEach = (bill + tax + tip) ÷ people
Split Expenseper person = (bill + tip) ÷ number of people
Cost Per Personper person = (fixed costs + per-person costs × people − subsidy) ÷ people
Percentage Splitamount = share ÷ total shares × amount to split
Birthday Countdowndays = next birthday − today
Anniversaryyears together = complete years since the start date
Time Sinceelapsed = today − the past date
Time Untilremaining = future date − today
PacePace (s per unit) = 3600 ÷ speed