General-purpose and Turkey-specific calculators.
30 free tools
3-in-1 timer: Stopwatch (lap recording, best/worst lap markers, ~10ms precision), Pomodoro (25/5 default, customizable, auto cycles, 4 = long break), Countdown (duration or target date/time). Web Audio API sound + Notification API alerts. (Client-side only; no server data.)
Turkish Motor Vehicle Tax — engine size + age based annual + 2 installments.
Turkish property tax — residential/commercial/land + metropolitan/normal city.
Turkish stamp tax — contract type + amount based.
Add VAT or extract tax base from inclusive price. 20/10/1/0% rates, bidirectional, all-rates comparison table.
2026 withholding tax across 9 payment types — freelance, rent, dividend, interest & more. Gross-net conversion with optional VAT.
VAT, withholding, advance tax, corporate tax and SSI deadlines for 2026. Upcoming obligation alerts and filters.
Rent increase calculator with CPI or 25% legal cap. Recent CPI quick select and annual projection table.
Impact of expense deductions, investment incentives, and R&D on income tax savings. 2026 tax brackets, taxable base and effective rate comparison.
Calculate Turkish title deed transfer tax (4% sale).
Calculate Turkish auto Special Consumption Tax + VAT.
Turkish Motor Vehicle Tax — engine size + age based annual + 2 installments.
Turkish property tax — residential/commercial/land + metropolitan/normal city.
Turkish stamp tax — contract type + amount based.
Convert between binary, octal, decimal and hexadecimal number systems.
Convert numbers to Turkish words. Ideal for checks and contracts.
3-in-1 timer: Stopwatch (lap recording, best/worst lap markers, ~10ms precision), Pomodoro (25/5 default, customizable, auto cycles, 4 = long break), Countdown (duration or target date/time). Web Audio API sound + Notification API alerts. (Client-side only; no server data.)
6 percentage calculation modes. Increase/decrease, ratios and more.
200+ units in 15+ categories: length, area, volume, mass, temperature, speed, energy, power, pressure, data, angle, frequency, fuel.
Age from birth date. Total days/weeks/months/hours, zodiac, Chinese zodiac, next birthday countdown.
Trig, log, exponents, factorial. Memory (M+/M-/MR/MC), history, DEG/RAD mode, keyboard support.
Calculate days between two dates. Working days, weeks, months breakdown. Add time to any date.
Calculate your weighted GPA from course grades and credits. 4.0 scale, letter grade, visual chart.
Calculate hourly rate from annual/monthly salary. Freelance invoice, VAT, withholding, leave days and reference table.
Total vehicle ownership cost including purchase, road tax, fuel (gas/diesel/electric/LPG), insurance, maintenance, depreciation. Per-km and monthly.
TR severance, notice pay, unused vacation comp — 2026 rates.
sin, cos, tan, cot, sec, csc, inverse and hyperbolic functions. Unit circle visualizer. Degree/radian/gradian.
Mean, median, mode, standard deviation, variance, quartiles, IQR and outlier analysis for students.
Molar mass from chemical formula. Mole ↔ gram ↔ molecules conversion, element composition, 10 common compounds.
Physics formulas in 5 categories: kinematics, dynamics, energy, waves, electricity. Free fall, Newton laws, Ohm law, physical constants reference.
Calculate your Body Mass Index from height and weight. WHO categories (underweight/normal/overweight/obese), visual gauge and ideal weight range.
Composition plan rates + installment table per Turkish IIK.
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Live weather + 7-day forecast for Turkish cities.
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Daily prayer times for Turkish cities (Diyanet method).
Calculate percentages, interest, age, dates, units, VAT, taxes and more, plus a scientific calculator and Turkey-specific tax tools.
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