Finance Calculators
Explore transparent, mathematically precise borrowing and savings tools for installment loans, home mortgages, discounts, amortization schedules, and dining gratuities.
Fixed-Rate Math
Standard monthly installment and mortgage calculations without lender bias.
Full Amortization
Period-by-period monthly and yearly breakdowns of principal and interest.
100% Client-Side
No loan amounts, income, or financial data ever leave your browser.
Featured Financial Tools
Client-side financial calculators for installment loans, home mortgages, and everyday gratuities.
Loan Calculator
Fixed-Rate AmortizationEstimate monthly loan payments, total interest costs, and full monthly and yearly amortization schedules.
Mortgage Calculator
PITI, Down Payment & HOAEstimate fixed-rate mortgage payments with property taxes, homeowners insurance, PMI, and HOA dues.
Cost of Living
Expenses & Index ParityCompare monthly expenses across 7 categories or evaluate index parity to calculate equivalent required income.
Discount Calculator
Shopping & SavingsCalculate sale prices, amount saved, effective stacked discounts, and compare deals.
Tip Calculator
Gratuity & Bill SplittingCalculate custom tips, optional sales taxes, choose pre/post tax basis, and split bills equally.
Finance Guides
Clear mathematical explanations of living expenses, loan amortization, mortgage budgeting, and tipping formulas.
How to Compare Cost of Living
A structured 5-pillar framework comparing true housing, taxes, transit, food, and discretionary spending across cities.
Cost of Living Index Explained
How composite price indices (100 baseline) measure relative purchasing power across geographical markets.
Equivalent Salary & Living Costs
Calculate required target compensation to maintain purchasing power parity when relocating or negotiating remote pay.
How Mortgage Payments Are Calculated
The standard mortgage amortization equation, periodic rates, and loan balance reductions.
PITI Mortgage Payments Explained
Understand how property taxes, insurance, and escrow accounts shape monthly housing costs.
Down Payment vs Mortgage Loan Amount
How upfront down payments alter monthly payments, total interest, and PMI thresholds.
How to Calculate a Tip
Quick mental math techniques and exact formula steps for calculating gratuity.
Tip Before or After Tax?
Understand the mathematical difference between pre-tax and post-tax tipping on receipts.
How to Calculate a Discount
Learn the step-by-step methods and shortcuts for calculating sales manually.
Stacked Discounts Explained
Find out why combining multiple percentages isn't as simple as adding them together.
How Loan Payments Are Calculated
The standard installment loan equation and periodic interest rates.
Principal vs Interest
See how each loan payment is divided between balance reduction and borrowing cost.
Loan Amortization Schedule Explained
Read monthly balances, principal, interest, and cumulative totals in an amortization table.
How to Split a Bill With Tip
Calculate tax, gratuity, totals, and an equal per-person share without rounding surprises.