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Free widgets · 53 calculators

Free calculator widgets for your website

Add a working salary, tax, VAT, SIP or pricing calculator to any blog, HR portal or client site. One line of code, mobile-friendly, always up to date with current rules — free, with a small "Powered by Rebota" credit.

1. Pick a calculatorPreview it live below.
2. Copy the codePaste it into any HTML block, WordPress, Webflow or Wix embed.
3. DoneRates and rules update automatically — nothing to maintain.

Salary & payroll

Australia Pay Calculator 2026-27 — Take-home Pay

Australian take-home pay for 2026-27: income tax with the new 15% rate, Medicare levy, low income tax offset and 12% super — weekly, fortnightly and monthly.

Canada Salary Calculator 2026 — Take-home Pay

Canadian take-home pay for 2026: federal tax with the new 14% rate, CPP, CPP2, EI and your provincial tax — per paycheque, month and year.

Employee Cost Calculator

Free employee cost calculator: the full monthly and annual cost of an employee — salary, employer PF, ESI, gratuity, insurance and overheads — and the multiplier over gross pay.

Gratuity Calculator

Calculate gratuity under the Payment of Gratuity Act 1972: 15 days' last drawn basic + DA per year of service ÷ 26, rounding rules and the ₹20 lakh tax-free limit.

HRA Exemption Calculator

Calculate your HRA exemption under section 10(13A): least of actual HRA, rent paid minus 10% of basic, and 50% (metro) or 40% of basic. See exempt and taxable HRA instantly.

NPS Calculator

Free NPS calculator: estimate your National Pension System corpus at 60, the tax-free lump sum and the monthly pension from the annuity.

Retirement Calculator

Free retirement planning calculator: the corpus you need to retire, adjusted for inflation, and the monthly investment required to build it.

Salary Calculator — CTC to In-hand

Convert CTC to monthly in-hand salary: employer and employee PF, gratuity, professional tax and new-regime income tax for FY 2025-26 — with a full breakdown.

Saudi Salary & GOSI Calculator

Saudi Arabia salary calculator: net pay after GOSI for Saudi nationals, employer GOSI cost and end-of-service award under the Saudi Labour Law.

Singapore Salary Calculator — Take-home Pay & CPF

Singapore take-home pay calculator 2026: employee CPF by age, employer CPF, income tax for residents and non-residents, monthly and yearly net salary.

South Africa Salary Calculator 2026/27 — PAYE

South African take-home pay for the 2027 tax year: PAYE with SARS brackets and rebates, UIF and retirement fund deductions — monthly and yearly.

UAE Salary & Gratuity Calculator

UAE salary calculator: net monthly pay after GPSSA pension for UAE nationals, total package and end-of-service gratuity under the UAE Labour Law.

UK Salary Calculator — Take-home Pay 2026/27

Work out UK take-home pay for 2026/27: income tax, National Insurance, pension and student loan from your gross salary — monthly and yearly breakdown.

US Paycheck Calculator 2026 — Salary After Tax

Estimate US take-home pay for 2026: federal income tax, Social Security, Medicare, state tax and 401(k) from your salary — per paycheck, month and year.

Tax, VAT & GST

Australia GST Calculator

Australian GST calculator: add 10% GST or work out the GST inside a GST-inclusive price (divide by 11). Net, GST and total instantly.

Canada GST/HST Calculator

Canada GST/HST calculator: add or remove 5% GST or 13%, 14% or 15% HST by province. Net, tax and total instantly, with the reverse formula.

GST Calculator — Add or Remove GST (GST 2.0 Rates)

Free GST calculator with the new GST 2.0 slabs (5%, 18%, 40%): add or remove GST, split CGST/SGST or IGST, with construction material and works contract rates.

Germany VAT (MwSt) Calculator

German VAT (Mehrwertsteuer) calculator: add or remove 19% or 7% MwSt. Net, VAT and gross amounts instantly, with the correct reverse formula.

Income Tax Calculator FY 2025-26 (New Regime)

Free income tax calculator for FY 2025-26 (AY 2026-27) under the new regime: ₹75,000 standard deduction, zero tax up to ₹12 lakh with 87A rebate, marginal relief, surcharge and 4% cess.

NZ GST Calculator

New Zealand GST calculator: add 15% GST or find the GST inside a GST-inclusive price (multiply by 3/23). Net, GST and total instantly.

Old vs New Tax Regime Calculator FY 2025-26

Compare income tax under the old and new regimes for FY 2025-26 with 80C, 80D, HRA, home-loan interest and NPS deductions — and see which regime saves you more.

Sales Tax Calculator

Free sales tax calculator: add state and local sales tax to a price, or reverse-calculate the pre-tax price from a total. Works for any US state or any sales-tax rate.

Saudi VAT Calculator

Saudi Arabia VAT calculator: add 15% VAT or extract VAT from a VAT-inclusive price in SAR. Formula, zero-rated supplies and ZATCA registration rules.

Singapore GST Calculator

Singapore GST calculator: add 9% GST to a price or extract GST from a GST-inclusive amount. Formula, the 9/109 fraction and registration threshold.

South Africa VAT Calculator

South African VAT calculator: add 15% VAT or remove VAT from a VAT-inclusive price (multiply by 15/115). Net, VAT and total instantly.

UAE VAT Calculator

UAE VAT calculator: add 5% VAT to a price or extract VAT from a VAT-inclusive amount in AED. Includes the formula, zero-rated supplies and registration rules.

UK VAT Calculator

UK VAT calculator: add or remove VAT at 20% standard, 5% reduced or 0% zero rate. Net, VAT and gross amounts instantly, with the correct reverse formula.

VAT Calculator

Free VAT calculator: add VAT to a net price or extract VAT from a gross price at any rate — 20% UK, 5% UAE, 15% Saudi Arabia, 19% Germany and more.

Savings & investment

CAGR Calculator — Compound Annual Growth Rate

Free CAGR calculator: find the compound annual growth rate between a start and end value, absolute return, inflation-adjusted CAGR and year-by-year growth.

EMI Calculator — Loan EMI with Amortization Schedule

Free EMI calculator for home, car, personal and business loans: monthly EMI, total interest, processing fee, prepayment savings and a year-by-year amortization schedule.

FD Calculator

Free fixed deposit calculator: maturity amount and interest earned for any deposit, rate and tenure with quarterly, monthly, half-yearly or yearly compounding.

Home Loan Eligibility Calculator

Free home loan eligibility calculator: the maximum loan and EMI you qualify for from your income, existing EMIs, interest rate, tenure and the bank's FOIR limit.

Lumpsum Calculator

Free lumpsum calculator: future value of a one-time investment at an expected annual return, total gains and a year-by-year growth table.

PPF Calculator

Free PPF calculator: maturity value, total interest and year-wise balance for yearly Public Provident Fund deposits over 15 years (or extended), with annual compounding.

RD Calculator

Free recurring deposit calculator: maturity value and interest for a monthly RD with quarterly compounding, the method used by SBI, post office and most Indian banks.

SIP Calculator

Free SIP calculator: see the future value of a monthly mutual fund SIP, total invested, estimated gains and a year-by-year table — with optional annual step-up.

SWP Calculator

Free SWP calculator: how long your corpus lasts with a fixed monthly withdrawal, the final balance, total withdrawn and a yearly balance table.

Simple Interest Calculator

Free simple interest calculator: interest and total amount for any principal, rate and time in years, months or days, compared with compound interest.

Business & pricing

Break-even Calculator

Free break-even calculator: find how many units and how much revenue you need to cover fixed costs, contribution margin per unit, and units needed for a target profit.

Depreciation Calculator

Free depreciation calculator: yearly depreciation and book value under the straight-line and written-down-value methods, with a full schedule for any asset.

Discount Calculator

Free discount calculator: final price after a percentage discount, amount saved, and the true effective discount when two discounts are stacked.

EPF & ESIC Calculator — Employee and Employer Contribution

Calculate EPF, EPS, EDLI and ESIC contributions for employee and employer — with the ₹15,000 PF ceiling option, ₹21,000 ESIC limit and total cost per employee.

LTV to CAC Calculator

Free LTV to CAC ratio calculator: customer lifetime value from revenue, gross margin and churn, customer acquisition cost, LTV:CAC ratio and CAC payback months.

Malaysia SST Calculator

Malaysia SST calculator: add or remove 10% or 5% sales tax, or 8% or 6% service tax. Net, tax and total amounts instantly.

Markup Calculator

Free markup calculator: get the selling price, profit and resulting margin from cost and markup %, plus the markup you need to hit a target margin.

Percentage Calculator

Free percentage calculator: find X% of Y, what percent X is of Y, and the percentage increase or decrease from X to Y — all at once, with formulas.

Profit Margin Calculator

Free profit margin calculator: enter cost and selling price to get gross profit, profit margin percentage and markup percentage, with the formulas explained.

ROI Calculator

Free ROI calculator: total return on investment, net profit and annualised ROI for any amount invested and returned over a period — for projects, equipment, marketing or shares.

TDS Calculator FY 2025-26 — Rates & Thresholds

Free TDS calculator for FY 2025-26: 194C contractor, 194J professional fees, 194I rent, 194H commission, 194A interest and 194Q — with new Budget 2025 thresholds and no-PAN rates.

Inventory & operations

Cash Conversion Cycle Calculator

Free cash conversion cycle calculator: days sales outstanding, days inventory outstanding, days payables outstanding and the CCC — plus the cash tied up in working capital.

EOQ Calculator — Economic Order Quantity

Free EOQ calculator: optimal order quantity with the Wilson formula √(2DS/H), orders per year, total ordering and holding cost, and the reorder point for your lead time.

Import Landed Cost Calculator

Free import landed cost calculator for India: assessable value, basic customs duty, social welfare surcharge, IGST and the true landed cost per unit, with and without input tax credit.

Inventory Turnover Calculator

Free inventory turnover calculator: turnover ratio from cost of goods sold and average inventory, plus days inventory outstanding (DIO) for any period.

Embedding FAQs

Are the calculator widgets really free?

Yes. Embed as many as you like on any site, commercial or personal. The only requirement is keeping the small "Powered by Rebota" credit inside the widget.

Will the widget slow my page down?

The iframe loads lazily, so it is only fetched when a visitor scrolls near it, and it runs entirely in the browser.

Do I need to update tax rates myself?

No. The widget always loads the live calculator, so rate and rule changes appear on your site automatically.

Can I change the height?

Yes — edit the height attribute in the code. 560–700px suits most calculators; results with tables need more.