Finance & Loans Calculators & Tools
Calculate mortgage payments, loan rates, self-employment taxes, and interest compound growths. Built to run completely client-side in your browser for total privacy, zero data collection, and instant calculations.
Available Finance & Loans Tools
Mortgage Payment Calculator
Estimate monthly mortgage payments, interest rates, and loan terms.
Loan Payment Calculator
Calculate monthly payments and interest costs for personal, auto, or student loans.
ROI Calculator
Compute the return on investment (ROI) for business projects or investments.
Self-Employment Tax Calculator
Estimate self-employment tax liabilities (FICA, Medicare) for freelancers.
Compound Interest Calculator
Visualize the growth of savings and investments through compounding interest over time.
Payroll Tax Calculator
Calculate take-home pay, federal taxes, and state deductions from payroll.
Paycheck Calculator
Estimate hourly and overtime take-home pay after federal, state, and FICA taxes per pay period.
Break-Even Analysis Calculator
Determine the sales volume or revenue needed to cover fixed and variable costs.
Amortization Schedule Calculator
Generate a full payment schedule showing interest and principal breakdown over time.
Auto Loan Calculator
Calculate auto loan monthly payments, total interest, and amortization schedule with trade-in and taxes.
Sales Tax Calculator
Calculate sales tax, reverse sales tax, and run multi-item receipts with state average lookups.
Property Tax Calculator
Estimate annual property taxes by state with homestead exemption adjustments.
Net Worth Calculator
Track your assets and liabilities dynamically to determine your net worth. Anonymous and local.
Inflation Calculator
Calculate the purchasing power of money over time using historical CPI data.
Percentage Calculator
Calculate percentages, percentage change, and rates with custom visual graphs.
SaaS CAC:LTV Calculator
Calculate customer acquisition cost (CAC), lifetime value (LTV), LTV:CAC ratios, and payback periods.
DTI Calculator
Calculate your Debt-to-Income (DTI) ratio for mortgage qualification. See front-end and back-end DTI and lender classification.
HELOC Calculator
Calculate home equity line of credit payments, borrowing limit, and total interest across draw and repayment periods.
Salary Calculator
Calculate your take-home pay after federal, state, and FICA taxes. See monthly, bi-weekly, and weekly amounts for any salary and state.
Student Loan Repayment Calculator
Compare student loan repayment plans including Standard, Graduated, Extended, and income-driven (IBR, PAYE, REPAYE, ICR).
Credit Card Payoff Calculator
Estimate your payoff timeline, total interest charges, and see how much you save by paying extra each month.
Stripe Fee Calculator
Calculate domestic, international, and instant payout Stripe processing fees, plus reverse fee calculations.
PayPal Fee Calculator
Calculate PayPal merchant, Goods & Services, Friends & Family, and international transaction fees with reverse calculations.
APR Calculator
Calculate effective Annual Percentage Rate (APR) for loans with origination fees and credit card interest rate conversions.
FIRE Calculator
Calculate your Financial Independence Retire Early (FIRE) number, savings rate, portfolio growth, and target age.
Business Loan Calculator
Calculate monthly payments, origination fees, interest costs, and full amortization schedules for SBA and commercial business loans.
Finance & Loans Guides & Technical Comparisons
In-depth references, mathematical formulas, and technical comparisons related to finance & loans calculations.
APR vs Interest Rate: What's the Real Difference?
Learn how nominal interest rate differs from annual percentage rate (APR) when shopping for mortgages and personal loans.
Mortgage vs HELOC: Which Borrowing Option Is Best?
Detailed comparison between fixed primary mortgages and home equity lines of credit.
Stripe vs PayPal Fees: Complete Merchant Fee Comparison
Compare transaction fees, international surcharges, and chargeback rates for online sellers.
How Is Mortgage Interest Calculated? (Formulas & Schedule)
Step-by-step breakdown of monthly compounding and amortization math.
How to Calculate Self-Employment Tax (Schedule SE)
Calculate Medicare and Social Security obligations for 1099 independent contractors.
What Is DTI and How Do Lenders Calculate It?
Front-end vs back-end debt-to-income qualification thresholds explained.
Explore Other Categories
Real Estate & Mortgage
Determine affordability, refinance benefits, and rental property yields.
Everyday / Life Utility
Secure, local random password generators, instant age calculations, and QR codes.
Developer Tools
Formatters, encoders, regex testers, and color converters built for developers.
Text & Content
Word counters, text diff comparers, case text converters, and content clean utilities.
Marketing & SEO
Optimize meta tags, analyze keyword densities, and generate redirects.
Health & Fitness
BMI calculators, caloric targets, macro splitters, and target heart rates.
Legal & Employment
Calculate payroll timelines, severance, overtime, and contract terms.
Education & Academics
GPA calculators, final grade planners, weighted grade solvers, and citation formatters.
Image & PDF Tools
Client-side image resizers, compressors, and PDF mergers. Fully private, no server uploads.
AI Tools
Token calculators, API pricing models, prompt formatters, and AI utility tools for LLM developers and creators.
Startup & SaaS
MRR/ARR calculators, burn rate estimators, SaaS valuation tools, and subscription metrics.