Finance
Stock Average Calculator
Weighted average cost, total shares, break-even price, and unrealized P/L from multiple lots.
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Client-side calculators and checkers for investing and personal finance, including an ROI calculator, a future value calculator, a discount calculator, a percent off calculator, a CD rate calculator, a markup calculator, a straight line depreciation calculator, a purchasing power calculator, a balance transfer calculator, a student loan refinance calculator, a break even sales calculator, a bottleneck calculator, an overtime calculator, an APR calculator, a monthly budget template, and a VAT number validator. Your numbers stay in the browser.
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Finance
Paycheck Calculator Hourly
Gross pay per paycheck from an hourly rate or salary — weekly, biweekly, semimonthly, or monthly.
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Emergency Fund Calculator
Target emergency savings from monthly essential expenses, plus the gap and months to fully fund.
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Mortgage Recast Calculator
New monthly payment, payment drop, and interest savings after a lump-sum recast — same remaining term, not a refinance.
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Refinance Calculator Auto Loan
Current vs new monthly payment, interest, fee break-even, and total cost for an auto loan refinance — all in the browser.
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Real Estate Commission Calculator
Total commission, listing-side and buyer-side dollars, and seller net proceeds from a home sale — all in the browser.
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Credit Utilization Calculator
Overall credit utilization %, available credit, per-card ratios, and dollars to pay to reach a target — all in the browser.
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403b Calculator
Employee contributions, optional employer match, and projected 403(b) balance at retirement — all in the browser.
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Monthly Budget Template
Monthly income and expense lines with totals, leftover surplus or deficit, and savings rate — all in the browser.
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VAT Number Validator
VAT number validator and VAT number checker for EU (and legacy GB) IDs — format, country, and check digits in the browser. Not a VIES lookup.
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Break Even Sales Calculator
Break-even units, sales revenue, and contribution margin from fixed costs, variable cost, and price — optional target profit. All in the browser.
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Bottleneck Calculator
Bottleneck step, system throughput, and utilization % from each step’s capacity — Theory of Constraints, all in the browser.
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Time Card Calculator
Total a week of start and end times with unpaid breaks in h:mm and decimal hours, split overtime after 40 hours, and estimate gross pay — all in the browser.
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Date Calculator
Count the days between two dates, or add and subtract days, weeks, months, and years from any date — all in the browser.
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Amortization Calculator
Monthly payment, total interest, and a full monthly or yearly amortization schedule for any fixed-rate loan, with optional extra payments — all in the browser.
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Tip Calculator
Tip amount, total with tip, and per-person split from a bill and a 15%, 18%, 20%, 25%, or custom tip — optional round up, all in the browser.
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Overtime Calculator
Regular pay, overtime pay, and total gross from hourly rate, regular/OT hours or total hours with a weekly threshold — default 1.5×, all in the browser.
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APR Calculator
Monthly payment, estimated APR, total interest, and total cost for a fixed installment loan — optional upfront fees reduce net proceeds, all in the browser.
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Student Loan Refinance Calculator
Current vs new monthly payment, total interest, estimated savings vs the current loan, and fee break-even for a student loan refinance — all in the browser.
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Balance Transfer Calculator
Stay-put vs promo APR payoff, transfer fee, months to pay off, total interest, and estimated savings for a credit card balance transfer — all in the browser.
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Purchasing Power Calculator
Equivalent buying power across years, % change in purchasing power, and a plain-language inflation summary — average rate or CPI indexes, all in the browser.
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Straight Line Depreciation Calculator
Annual straight-line expense, depreciable basis, optional monthly (annual ÷ 12), and a year-by-year book-value schedule — all in the browser.
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CD Rate Calculator
Ending balance, interest earned, APY or interest rate, and a year-by-year schedule from deposit, term, and compounding — all in the browser.
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Markup Calculator
Selling price, profit dollars, markup %, and margin % from cost plus markup percent or selling price — all in the browser.
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Percent Off Calculator
Discount amount, sale price, and percent off from original price plus percent off, sale price, or dollars off — all in the browser.
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Discount Calculator
Sale price, discount dollars, and discount % from list price plus % or $ off — plus reverse (sale + % → original) and stacked/successive percent discounts. All in the browser.
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Future Value Calculator
Future value, total contributions, and interest earned from an initial investment, optional deposits, annual rate, and compounding — all in the browser.
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ROI Calculator
ROI %, net profit, and final value from an initial investment plus ending value or gain — all in the browser.
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