Finance Tools

Amortization Calculator Finance

Calculate monthly loan payments, total interest, payoff date, extra-payment savings, and a downloadable amortization schedule.

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Auto Loan Calculator Finance

Calculate your monthly car payment, total interest, and loan cost — enter vehicle price, down payment, rate, and term.

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Bill Split Calculator Finance

Split any bill among friends — enter the total, number of people, tip percentage, and optional custom names to get an itemized per-person breakdown.

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Break-Even Calculator Finance

Find your break-even point — enter fixed costs, variable cost per unit, and selling price to see units needed and revenue required.

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Compound Interest Calculator Finance

Calculate compound interest with interactive growth chart, year-by-year table, and contribution breakdown.

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Credit Card Validator Finance

Validate credit card numbers using the Luhn algorithm — instantly detect card type (Visa, Mastercard, Amex, Discover), check validity, and format the number correctly.

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Credit Score Simulator Finance

Simulate how financial actions affect your credit score — see the estimated impact of paying off debt, missing payments, opening new accounts, and more.

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Crypto Profit Calculator Finance

Calculate crypto profit or loss from buy price, sell price, and quantity.

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Currency Converter Finance

Convert currencies with live exchange rates.

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Debt Payoff Calculator Finance

Calculate how long to pay off debt given balance, interest rate, and monthly payment.

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Debt-to-Income Calculator Finance

Calculate your debt-to-income (DTI) ratio to see if you qualify for loans — enter your monthly debts and gross income to get your DTI with lender benchmarks.

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Discount Calculator Finance

Calculate sale prices, savings, double discounts, tax, price per unit, and compare multiple items in bulk mode with visual price comparison bars.

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Dollar Cost Averaging Calculator Finance

Calculate the projected growth of a regular investment plan using dollar cost averaging — see total invested, projected value, and year-by-year breakdown.

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Electricity Bill Calculator Finance

Calculate your monthly electricity bill by adding appliances, their wattage and daily usage — see exact costs per device and total cost.

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Emergency Fund Calculator Finance

Find out exactly how much emergency fund you need based on your monthly expenses, job stability, and financial goals.

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FIRE Number Calculator Finance

Calculate your Financial Independence, Retire Early (FIRE) number — how much you need to save to retire and never work again, based on the 4% safe withdrawal rule.

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Freelance Rate Calculator Finance

Calculate the ideal freelance hourly rate based on your desired income, expenses, billable hours, and taxes. See your minimum and target rates instantly.

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Fuel Cost Calculator Finance

Calculate total fuel cost for any trip based on distance and consumption.

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Inflation Calculator Finance

Calculate how inflation affects purchasing power over time — enter an amount, start year, and end year to see today's equivalent value.

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Interest Calculator Finance

Calculate simple interest, compound interest, term deposits, and savings goals.

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Investment Calculator Finance

Calculate investment returns with compound growth and monthly contributions.

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Invoice Generator Finance

Create professional invoices with company details, line items, tax, discount, and download as PDF — all in your browser.

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Loan Amortization Calculator Finance

Generate a full year-by-year loan amortization schedule with principal and interest breakdown.

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Loan Calculator Finance

Calculate loan payments with SVG balance chart, amortization table, extra payment savings, and payoff date for monthly, biweekly, or weekly schedules.

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Loan Comparison Calculator Finance

Compare two loans side by side — see monthly payments, total interest, and total cost to find the best deal.

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Meeting Cost Calculator Finance

Calculate the real cost of meetings with live running timer, per-minute cost, visual comparisons, SVG cost breakdown, salary-to-hourly conversion, and shareable results.

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Micro-SaaS Acquisition Diligence Lab Finance

Paste a website or micro-SaaS acquisition inquiry to score buyer seriousness, scam risk, data-leak risk, valuation readiness, LOI/escrow gates and generate a reply email, diligence ledger, valuation CSV, data-room checklist, SVG board and JSON receipt.

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Monthly Budget Planner Finance

Visual monthly budget planner with income tracking, 12 built-in expense categories, custom categories, SVG donut and bar charts, 50/30/20 rule comparison, savings rate calculator, multi-month localStorage tracking with 6-month trend chart, and CSV export.

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Mortgage Calculator Finance

Calculate monthly mortgage payments with pie chart breakdown, amortization schedule, property tax, insurance, and PMI.

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Net Worth Calculator Finance

Add assets and liabilities to calculate your total net worth.

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Refund & Billing Dispute Evidence Packet Studio Finance

Organize a redacted refund, billing error or disputed-charge case into an evidence readiness packet with transaction reconciliation, timeline ledger, missing-evidence checklist, merchant follow-up draft, issuer review memo, SVG timeline, CSVs, Markdown and JSON receipt.

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Rent vs Buy Calculator Finance

Compare the financial impact of renting vs buying a home.

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Retirement Calculator Finance

Estimate when you can retire based on savings and expenses.

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ROI Calculator Finance

Calculate return on investment (ROI) — enter cost and gain to get ROI percentage, net profit, and annualized return.

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SaaS Renewal Waste Forensics Lab Finance

Paste redacted SaaS spend, seats, usage and renewal terms to find unused-seat waste, auto-renew risk, notice deadlines, quick wins, negotiation email, ICS calendar, CSV, SVG and JSON receipt.

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Salary Calculator Finance

Convert salary with overtime, tax estimate, 401k, insurance deductions, and paycheck breakdown.

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Savings Goal Calculator Finance

Calculate how many months to reach your savings goal with optional interest.

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Savings Rate Calculator Finance

Calculate your personal savings rate and see how it impacts your path to financial independence — enter your income and expenses to find your savings rate and estimated years to FIRE.

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Stock Profit Calculator Finance

Calculate stock investment profit from buy price, sell price, shares, and commission.

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Subscription Leak Forensics Lab Finance

Paste redacted card, bank or app-store rows to find recurring subscription leaks, price hikes, duplicate stacks, cancellation failures, renewal reminders, CSV, ICS, SVG and JSON receipt.

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Tip Calculator Finance

Calculate tip amount, total bill, and per-person split with preset buttons, custom slider, round up/down, and visual breakdown.

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Unit Price Calculator Finance

Compare prices per unit to find the best deal.

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