Hourly to Annual Salary Calculator
Hourly rate × hours per week × 52 (simple, no tax).
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Tip Calculator
Bill amount, tip percent, and party size—tip, total with tip, and per person.
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Discount Calculator
Original price and percent off—sale price and savings.
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Trip Fuel Cost Calculator
Miles, MPG, and price per gallon—gallons used and trip fuel cost (US units).
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Mortgage Payment Calculator
Loan amount, annual rate, and years—estimated monthly principal & interest (excludes tax/insurance).
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Compound Interest Calculator
Principal, annual rate, years, and compounding periods per year—future value.
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Percentage Change Calculator
Old value vs new value—absolute change and relative percent change.
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Markup & Margin Calculator
Cost plus markup % on cost—selling price and margin % of selling price.
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Sales Tax Calculator
Pre-tax subtotal and tax rate—tax amount and total with tax.
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Simple Interest Calculator
Principal, annual rate %, and years—interest and total repayment.
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Break-Even Calculator
Fixed costs, variable cost per unit, and price—units needed to break even.
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Rent Affordability Calculator
Monthly income and max rent % of income—rule-of-thumb rent cap.
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Decimal Odds to Implied Probability
Enter decimal odds (e.g. 2.50)—naïve implied win % (no vig removed).
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Credit Card Payoff Estimator
Balance, APR, and fixed monthly payment—months to payoff and total interest (simplified).
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CAGR Calculator
Starting value, ending value, and years—compound annual growth rate %.
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Retirement Savings Calculator
Monthly contribution, nominal annual return %, and years—future value and total contributed.
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Inflation Calculator
Present value, annual inflation %, and years—future nominal value and multiplier.
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Car Loan Calculator
Principal, APR %, and term in months—monthly payment and total interest (amortizing).
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Max Loan from Payment
Affordable monthly payment, APR %, and years—estimate maximum loan principal.
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Electricity Cost Calculator
kWh used and price per kWh—total electricity cost.
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Unit Price Calculator
Total price and quantity—cost per unit; optional second product comparison.
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Profit Margin Calculator
Revenue and cost—gross profit dollars and profit margin % on revenue.
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Commission Calculator
Sale amount and commission rate—fee and net to seller.
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List vs Sale Discount
List price and sale price—discount percent and dollars saved.
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Savings Goal (Months)
Target balance, monthly deposit, and nominal annual rate—months to reach goal (simplified).
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Payback Period Calculator
Upfront cost and constant yearly benefit—simple payback time in years.
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Hourly to Monthly Pay
Hourly rate × hours per week × (52÷12)—rough gross monthly (before tax).
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Percent of a Number
What is P% of N? Quick multiply N×P÷100.
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Price Before Tax
Tax-included total and rate—net price and tax portion.
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Stacked Discounts
Two successive percent-off steps—final price and equivalent single discount.
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Interest-Only Loan Payment
Principal and APR—monthly interest-only payment (no amortization).
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Loan-to-Value (LTV)
Loan amount and property value—LTV % for quick mortgage context.
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Debt-to-Income Ratio
Monthly debt payments and gross monthly income—DTI %.
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Part vs Whole Percent
What percent is A of B? (A / B) × 100.
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Annual → Monthly Salary
Gross annual pay ÷ 12 (plus rough weekly from ÷ 52).
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Stock Split Shares
Shares held and split factor—count after split.
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CPM Ad Cost
Impressions and CPM—simple media cost estimate.
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Rent per ft²
Monthly rent and leased square feet—$/ft²/month.
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Meeting Cost
People, hourly rate, minutes—rough meeting cost.
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Trip Fuel (L/100 km)
EU-style consumption, km, price per liter—trip cost.
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Vacation Payout
Daily pay × payout days—simple gross estimate.
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Rent per m²
Monthly rent and square meters—€/m² style density.
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VAT Gross from Net
Net amount and VAT %—gross and tax portion.
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Trip MPG
Miles since last fill and gallons pumped—MPG estimate.
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Margin of Error
Sample size and confidence—proportion poll MOE (p=0.5).
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Credit Utilization
Balance and credit limit—utilization percent (rough guidance).
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Decimal → Percent
Convert a decimal like 0.25 to a percent string.
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Percent → Decimal
Strip % and divide by 100—quick conversion.
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Lease Miles
Allowed vs driven mileage (rough).
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Salary → Hourly
Annual ÷ (hours × 52 weeks).
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Grade %
Earned ÷ possible points.
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Tip + Tax
Subtotal, tax %, tip % breakdown.
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Net Pay (Flat %)
Illustrative take-home after flat %.
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Biweekly ÷26
Gross per paycheck from annual.
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Semimonthly ÷24
Twice-a-month gross from annual.
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Weekly Gross
Hourly × hours per week.
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Monthly Gross
Hourly to rough monthly gross.
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