Exact answers, instantly.
Free calculators, unit converters and text tools that show the formula, the chart and the answer — privately in your browser.
⭐ Most popular tools
Browse by category
Finance Calculators
Loan, mortgage, interest, investing, retirement and salary calculators with exact amortization math.
29 tools →📈Business Calculators
Margin, markup, break-even, VAT, commission and pricing calculators for small businesses.
9 tools →📣Marketing Calculators
CPM, CPC, CTR, ROAS, CAC, LTV, AdSense and YouTube revenue calculators for marketers and creators.
11 tools →🧾Everyday Calculators
Tip, discount, sales tax, unit price, budgeting, cooking and household calculators.
24 tools →❤️Health & Fitness Calculators
BMI, BMR, TDEE, body fat, heart-rate zone, pace and nutrition calculators using published equations.
21 tools →➗Math Calculators
Percentages, fractions, roots, exponents, logarithms, number bases, primes and equation solvers.
48 tools →📊Statistics Calculators
Mean, median, mode, standard deviation, quartiles, z-scores, sample size and probability.
18 tools →📐Geometry Calculators
Area, perimeter, volume and surface-area calculators for every common 2D and 3D shape.
26 tools →📅Date & Time Calculators
Age, days between dates, business days, countdowns, time duration and Unix timestamp tools.
15 tools →⚛️Physics & Science Calculators
Speed, force, energy, Ohm’s law, density, pressure, chemistry and weather calculators.
28 tools →🏠Home & Construction Calculators
Concrete, paint, tile, flooring, roofing, drywall, mulch and HVAC sizing calculators.
19 tools →🚗Auto & Travel Calculators
Fuel cost, MPG, EV charging, depreciation, cost-per-mile and trip planning calculators.
11 tools →✍️Text Tools
Word counters, case converters, line tools, find and replace, ciphers and text generators.
52 tools →🧑💻Developer Tools
JSON, Base64, URL encoding, hashing, regex, minifiers, UUID and password generators.
38 tools →🔎SEO & Marketing Tools
Keyword density, meta tags, schema markup, robots.txt, UTM links and SERP preview tools.
15 tools →🎨Color Tools
HEX, RGB, HSL and CMYK converters, contrast checker, palettes and shade generators.
10 tools →📏Unit Converters
Length, weight, volume, temperature, area, speed, data, energy and more — exact factors.
445 tools →Why people use Taurang
🎯 Exact answers
Every tool uses standard published formulas and exact constants, verified by automated tests against known values.
⚡ Instant and free
No sign-up, no limits, no waiting. Results update as you type and work on any phone, tablet or computer.
🔒 Private by design
Calculations run inside your browser. Your numbers and text are never uploaded or stored.
📊 See the numbers
Interactive charts, worked examples and reference tables explain the result, not just display it.
📬 Get new tools first — free
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