Ganaka
Free calculators for everyone. Works offline.
All 119 calculators
Finance
- EMI Calculator: Monthly instalment, total interest and payoff schedule for any loan.
- Loan Prepayment Calculator: See how much interest and time an extra monthly payment saves.
- SIP Calculator: Future value of a monthly investment at an expected return.
- Step-up SIP Calculator: SIP where the monthly amount rises by a fixed percentage every year.
- SIP Goal Calculator: Monthly SIP needed to reach a target corpus.
- Lumpsum Calculator: Growth of a one-time investment.
- Compound Interest Calculator: Compound growth with any compounding frequency and optional monthly top-ups.
- Simple Interest Calculator: Interest and total on a principal at a flat rate.
- Fixed Deposit Calculator: Maturity amount of an FD with quarterly or other compounding.
- Recurring Deposit Calculator: Maturity value of a monthly recurring deposit.
- PPF Calculator: Public Provident Fund balance at maturity (15 years, extendable).
- Mortgage Calculator: Payment with property tax, insurance and down payment.
- Loan Eligibility Calculator: Estimate the loan a lender may offer from income and existing EMIs.
- Credit Card Payoff Calculator: Months and interest to clear a card balance.
- Debt Payoff Planner: Compare snowball and avalanche for several debts.
- Retirement Corpus Calculator: Corpus you need at retirement and the SIP to build it.
- FIRE Number Calculator: Financial-independence number from expenses and a safe withdrawal rate.
- Monthly Budget Planner (50/30/20): Split income into needs, wants and savings and compare with your actuals.
- Income Tax Calculator (India): Compare old and new regime tax with deductions, surcharge and cess.
- ROI Calculator: Return on investment as an amount, percentage and yearly rate.
- CAGR Calculator: Compound annual growth rate between two values.
- Inflation Calculator: What money today will be worth, or cost, in the future.
- HRA Exemption Calculator: Tax-exempt House Rent Allowance under the old regime.
- Gratuity Calculator: Gratuity payable on leaving an employer (India).
- EPF Calculator: Provident fund corpus from employee and employer contributions.
- NPS Calculator: Pension corpus and expected monthly pension from NPS.
- SWP Calculator: How long a corpus lasts with systematic monthly withdrawals.
- Rule of 72 Calculator: Years for money to double, or the rate needed.
- Rent vs Buy Calculator: Compare the wealth you end up with by buying a home or renting and investing.
Tax & Business
- GST / VAT Calculator: Add or remove GST or VAT from a price, with CGST/SGST split.
- Discount Calculator: Sale price after one or two discounts.
- Percentage Calculator: Six everyday percentage questions in one place.
- Ratio Calculator: Simplify a ratio or solve A:B = C:?
- Profit Margin & Markup Calculator: Margin, markup and the price needed for a target margin.
- Break-even Calculator: Units and revenue needed to cover fixed costs.
- Salary Converter: Convert a salary between yearly, monthly, weekly, daily and hourly.
- Tip & Bill Split Calculator: Tip, total and each person's share.
- Currency Converter (manual rate): Convert using a rate you enter, so it works offline.
- Commission Calculator: Tiered or flat sales commission.
- Invoice Total Calculator: Line items with discount and tax to a printable total.
- Ad ROAS & CPA Calculator: Return on ad spend, cost per acquisition and break-even ROAS.
Health & Fitness
- BMI Calculator: Body mass index with category and healthy weight range.
- BMR Calculator: Calories your body burns at rest (Mifflin-St Jeor).
- Calorie (TDEE) Calculator: Daily calories for maintaining, losing or gaining weight.
- Ideal Weight Calculator: Estimates from four common formulas.
- Body Fat Calculator (US Navy): Body fat percentage from tape measurements.
- Daily Water Intake Calculator: A starting point for daily fluids.
- Macro Calculator: Protein, carbohydrate and fat grams from calories.
- Waist-to-Hip Ratio Calculator: Ratio and general risk band (WHO).
- Heart-rate Zones Calculator: Training zones from maximum heart rate (Karvonen).
- Heat Index Calculator: How hot it feels from temperature and humidity.
- Pregnancy Due Date Calculator: Estimated due date from the last period (Naegele).
- Running Pace Calculator: Pace, speed or finish time for a run.
- Body Surface Area Calculator: BSA by Mosteller, DuBois and Haycock.
- Sleep Cycle Calculator: Best bedtimes or wake-up times in 90-minute cycles.
- Waist-to-Height Ratio: A simple central-fat indicator: keep waist under half your height.
Education
- GPA Calculator (4.0 scale): Semester GPA from letter grades and credits.
- CGPA Calculator: Cumulative CGPA from semester SGPAs and credits.
- CGPA to Percentage Converter: Convert CGPA to percentage and back (CBSE and VTU style).
- Weighted Grade Calculator: Overall grade from scores and weights, and the final exam score you need.
- Attendance Calculator: Your attendance percentage and how many classes you can miss.
- Marks & Percentage Calculator: Total, percentage and division from subject marks.
- Exam Study Planner: Daily study hours needed before an exam.
- Final Exam Grade Calculator: The score you need on the final to reach a course grade.
Math
- Basic Calculator: Type a sum and get the answer. Understands brackets, % and powers.
- Scientific Calculator: Trig, logs, roots, factorials and constants (π, e, φ).
- Fraction Calculator: Add, subtract, multiply or divide fractions and see the simplest form.
- Quadratic Equation Solver: Roots, discriminant and vertex of ax² + bx + c = 0.
- Simultaneous Equations (2 × 2): Solve two linear equations in x and y.
- Graphing Calculator: Plot y = f(x) and read off values.
- Prime Number Checker & Factorizer: Is it prime? Prime factors and number of divisors.
- GCD & LCM Calculator: Greatest common divisor and least common multiple of several numbers.
- Statistics Calculator: Mean, median, mode, spread and quartiles for a data set.
- Permutation & Combination Calculator: nPr and nCr, exact for large values.
- Arithmetic & Geometric Sequence Calculator: nth term and sum of a sequence.
- Matrix Calculator (2×2 and 3×3): Determinant, inverse, transpose and multiplication.
- Roman Numeral Converter: Numbers to Roman numerals and back.
- Random Number & Dice Generator: Random integers, dice rolls, coin flips and picks from a list.
- Average Calculator: Mean, median and weighted average.
- Area & Perimeter Calculator: Area and perimeter of common shapes.
- Volume & Surface Area Calculator: Cube, cylinder, cone, sphere and box.
- Pythagorean Theorem Calculator: Find the missing side of a right triangle.
- Scientific Notation Converter: Standard form to scientific notation and the spelled-out number.
Date & Time
- Date Difference Calculator: Years, months, days, weeks and hours between two dates.
- Add or Subtract Days from a Date: What date is it after N days, weeks, months or years?
- Age Calculator: Exact age in years, months and days, plus the next birthday.
- Countdown Calculator: Time left until a date, updated live.
- Working Days Calculator: Business days between two dates, or a date N working days ahead.
- Day of the Week Calculator: Weekday, week number, day of year and leap-year check for any date.
- Time Zone Converter: Convert a time between world cities and zones.
- Time Duration Calculator: Add up hours and minutes, or find the time between two clock times.
- Days Until Calculator: Days, weeks and working days from today to a date.
- Unix Timestamp Converter: Epoch seconds or milliseconds to a date, and back.
Converters
- Unit Converter: Length, mass, area, volume, speed, data, time, energy, power, pressure, angle, force, temperature and fuel.
- Number Base Converter: Binary, octal, decimal and hexadecimal (any size).
- Colour Converter: HEX, RGB, HSL and CMYK, with a contrast check against black and white.
- Clothing & Shoe Size Converter: Shoe sizes between India, UK, US and EU.
- Word & Character Counter: Words, characters, sentences and reading time.
Travel
- Trip Fuel Cost Calculator: Fuel needed and cost for a journey.
- Fuel Mileage Calculator: Your real mileage from a full-tank fill-up.
- Speed, Distance & Time Calculator: Find whichever of the three you do not know.
- Trip Expense Splitter: Who owes whom after a group trip.
- EV Charging Time & Cost Calculator: How long charging takes and what it costs.
- Petrol vs EV Running Cost: Cost per km and yearly savings of going electric.
- Trip Carbon Footprint Calculator: CO₂ from a journey by car, bus, train or flight.
Tech & DevOps
- Uptime / SLA Downtime Calculator: Allowed downtime for 99%, 99.9%, 99.99% and your own target.
- Composite SLA Calculator: Availability of a system built from serial or redundant components.
- Error Budget Calculator: How much failure your SLO allows, and how fast you are burning it.
- CIDR / Subnet Calculator: Network, broadcast, mask and host range for an IPv4 block.
- Subnet Splitter: Divide a block into equal subnets.
- Data Transfer Time Calculator: How long a file or backup takes at a given bandwidth.
- Bandwidth-Delay Product: Data in flight and the TCP window you need to fill a link.
- RAID Capacity Calculator: Usable space and fault tolerance for RAID levels.
- Kubernetes Resource Calculator: Total CPU and memory for replicas, with node-count estimate.
- Cron Expression Explainer: Plain-English meaning and next run times for a cron schedule.
- Password Strength Calculator: Entropy and time to brute-force. Runs only in your browser.
- Cloud Cost Estimator: Monthly cost from your own unit prices, so it never goes stale.
- Capacity & Little's Law Calculator: Concurrency, throughput and servers needed for a load.
- Backup Storage Calculator: Storage required for full, incremental and retention.