Skip to main content

Everyday tools

Everyday tools — calculator, timer, currency, age

The hub for the small utilities you reach for on any given day — quick maths, timing something, checking a date or an age, splitting a bill, or comparing the clock across time zones. This page lays them all out so you can grab the right one in a click. Each loads in under a second, works offline, and never asks for an account.

  • No uploads — files stay on your device
  • WebAssembly fast
  • Works offline
  • 100% free, no sign-up

8 tools in Everyday tools

Browse all categories
CalculatorNew

Scientific calculator with parentheses, sin/cos/log and a history.

Stopwatch & TimerNew

Stopwatch with laps and a countdown timer with sound.

World ClockNew

Current time across cities — see offsets vs your local timezone.

Age CalculatorNew

Years, months, days lived — plus days until your next birthday.

Tip & Bill SplitterNew

Split a bill, calculate tip, round up the per-person total.

BMI CalculatorNew

Body mass index with healthy weight range. Metric + imperial.

Loan / EMI CalculatorNew

Equated monthly instalment, total interest, full amortization schedule. Multi-currency.

Date DifferenceNew

Time between two dates in years, months, days, weeks, hours. Workday counter. Add/subtract days mode.

Go deeper · Learning Center

Everyday math you can trust — BMI, loan EMIs and the numbers behind them

Start here: which everyday tool for which job

The small utilities you reach for daily — and the limit worth knowing for the ones that touch health or money. Pick a row, follow the link:

You need toUseNote
Do quick or scientific mathCalculatorRespects order of operations
Estimate a loan repaymentLoan / EMI CalculatorA planning estimate, not a quote
Check a BMI figureBMI CalculatorA screening proxy, not a diagnosis
Work out an exact ageAge CalculatorCalendar-accurate, leap-aware
Count days between two datesDate DifferenceInclusive vs exclusive matters
Split a bill with tipTip CalculatorCheck for an added service charge
Compare times across zonesWorld ClockDST is where meetings drift

Who this hub is for, and where to begin

Students and shoppers doing quick sums, friends splitting a restaurant bill, remote teams juggling time zones, and anyone planning around a date — a birthday, a deadline, a loan. These are the everyday jobs a phone's built-in apps handle clumsily, done in a single fast page.

Start with the Calculator for maths, the Tip Splitter for a shared bill, the World Clock for meetings across zones, and the Age or Date Difference tools for anything calendar-related. The two that touch health and money — BMI and the loan calculator — give you a planning estimate, not professional advice; the Everyday Math Learning Center hub explains exactly what each number means and where it misleads.

Frequently asked questions

  • Does the calculator handle scientific functions?

    Yes — sin, cos, tan, log, ln, sqrt, exponents, pi, e, parens, percentages. The expression engine is hand-built (no eval), so nothing you type can run as code.

  • Will the world clock save my picks?

    Yes — your selected cities are stored in `localStorage` so they're there next time you open the tool. Same for calculator history.

  • Are my files uploaded anywhere?

    No. Every SnapToolz tool runs entirely in your browser using JavaScript and WebAssembly. Files are read locally, processed in memory, and the result is offered as a download. There is no backend.

  • Is everything free?

    Yes — every tool in this category and on the entire site is free with no sign-up, no daily limit, and no watermark.

Learn more about SnapToolz