Tip calculator
Bill × tip percent, split evenly across the table.
← All tools
Finance
Mortgage, loans, interest, retirement, tax, tips, salary, and net worth — calculated offline in this tab.
Runs in your browser · Nothing uploaded
- Tip calculatorBill, tip percent, split N ways.Runs in your browser · Nothing uploaded
- Indian govt salary calculator7th CPC Pay Matrix, DA, HRA, TA, NPS/GPF — editable rates, offline estimate. Not official pay.Runs in your browser · Nothing uploaded
- Sales tax calculatorAdd tax to a price or reverse a tax-inclusive total.Runs in your browser · Nothing uploaded
- Discount calculatorStack successive percent-offs and see the effective discount.Runs in your browser · Nothing uploaded
- Rule of 72Years to double an investment at a given rate — approx vs exact.Runs in your browser · Nothing uploaded
- Compound interest calculatorFuture value with compounding schedule and a simple growth chart.Runs in your browser · Nothing uploaded
- Simple interest calculatorInterest = principal × rate × time. Cross-links to compound.Runs in your browser · Nothing uploaded
- Mortgage calculatorMonthly payment and amortization schedule for a home loan.Runs in your browser · Nothing uploaded
- Loan calculatorPayment and amortization for personal, auto, or other loans.Runs in your browser · Nothing uploaded
- ROI calculatorReturn on investment and annualized ROI over years.Runs in your browser · Nothing uploaded
- Break-even calculatorUnits and revenue to cover fixed costs given contribution margin.Runs in your browser · Nothing uploaded
- Retirement calculatorFuture nest egg from savings and contributions; optional inflation.Runs in your browser · Nothing uploaded
- Net worth calculatorAssets minus liabilities with editable line items.Runs in your browser · Nothing uploaded
- Expense trackerLog expenses by category and total them. Data stays in this browser.Runs in your browser · Nothing uploaded
About Finance
Finance pages on the open web usually want an email before they will multiply two numbers. This category is the opposite: sales tax and stacked discounts, simple versus compound interest, rule of 72, mortgage and personal-loan amortization, ROI, break-even, retirement projections, and a line-item net worth sheet — all running from values you type, with nothing uploaded.
The tip calculator and the Indian 7th CPC government salary estimator live here too. Rates, DA percentages, and loan terms are yours to enter; we do not scrape banks or claim to be a financial advisor. Use the tools to check arithmetic, then verify anything official with the institution that actually pays or lends.
Tools in this category
Indian govt salary calculator
7th CPC Pay Matrix estimate with editable DA/HRA — planning math, not an official payslip.
Sales tax calculator
Add tax to a price or reverse a tax-inclusive total.
Discount calculator
Stacked percent-offs with final price and effective markdown.
Rule of 72
Years to double — napkin rule beside the exact ln math.
Compound interest calculator
Future value with compounding frequency and a growth chart.
Simple interest calculator
Principal × rate × time without compounding.
Mortgage calculator
Home loan principal-and-interest payment and amortization.
Loan calculator
Personal or auto loan payment schedule.
ROI calculator
ROI and annualized return over a holding period.
Break-even calculator
Units and revenue to cover fixed costs.
Retirement calculator
Nest egg from savings and contributions, optional inflation.
Net worth calculator
Assets minus liabilities with editable line items.
Expense tracker
Expense tracker logs spending by category and totals it. Entries live in this browser's local storage only, with no sync or editing; export CSV for a backup, and note that importing appends.
Common questions
Is this financial advice?
No. These pages are calculators. Markets, taxes, products, and suitability are outside the math.
Why are mortgage and loan calculators separate?
Same amortizing formula, different framing and search landing pages — home loans versus personal/auto notes.
Do any finance tools upload my numbers?
No. Inputs stay in the browser session for that tab.
Why these tools don't upload your files
There is no server to upload to. Each page is a static file, and the work happens in your browser. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network and it keeps working. The longer explanation