Directory
All free calculators
Every Calcutly tool in one index. Open a calculator for instant results, the formula, a worked example, and FAQs. Nothing requires an account.
Work hours calculators
Time cards, clock in/out, overtime, shifts, decimal hours, timesheets, hourly pay, and IRS mileage reimbursement for U.S. workweeks.
- Time Card CalculatorEnter clock-in, clock-out, break, and a second shift for Monday through Sunday. Instant weekly hours, overtime after 40, decimal hours, and estimated gross pay.
- Work Hours CalculatorEnter hours worked each day (not clock times). Get weekly total, regular vs overtime, hours:minutes, and optional pay.
- Hours Worked CalculatorCalculate hours worked from one clock-in and clock-out, including unpaid break and overnight shifts. Shows decimal hours and hours:minutes.
- Hours CalculatorAdd up to six hour-and-minute segments (jobs, tasks, or split shifts) into one total in decimal hours and hours:minutes.
- Time CalculatorFind elapsed time between two clock times, or add/subtract a duration from a clock time. Handles overnight and next-day offsets.
- Clock In / Clock Out CalculatorConvert clock-in and clock-out punches to paid hours with unpaid break and payroll rounding: none, 5, 10, 15 minutes, or the 7-minute rule.
- Overtime CalculatorSplit a week of daily hours into regular, overtime, and double-time using FLSA weekly-40, daily-8, or both (California-style). Optional pay.
- Shift CalculatorEnter shift start, shift length, unpaid break, and days per week. Get clock-out time (including overnight), paid hours, and weekly hours.
- Lunch Break CalculatorClock in, clock out, lunch out, and lunch return. Choose paid vs unpaid lunch to see paid hours, lunch length, and unpaid time.
- Biweekly Time Card CalculatorFourteen daily hour totals (two FLSA workweeks). Overtime is computed per week after 40, not after 80 hours in two weeks. Optional wage.
- Weekly Hours CalculatorThe simplest weekly hours tool: seven decimal hour boxes, total, days worked, and average per worked day. No wage and no overtime.
- Decimal Hours CalculatorConvert hours and minutes to decimal hours (7 hours 45 minutes = 7.75) and payroll hundredths for timesheets.
- Minutes to Decimal CalculatorConvert minutes to decimal hours for payroll. 90 minutes = 1.50 hours. Also shows hours:minutes.
- Decimal to Hours and Minutes CalculatorConvert decimal hours back to hours and minutes and HH:MM. 7.75 = 7 hours 45 minutes = 07:45 of duration (not a clock time).
- Hours and Minutes CalculatorAdd or subtract two durations (hours and minutes) with proper 60-minute carry. Shows decimal hours and total minutes.
- Hourly Pay CalculatorEstimate gross pay from regular hours, overtime hours, and double-time hours at your wage and multipliers. For hours you already counted.
- Hours to Salary CalculatorProject weekly, biweekly, monthly, and annual pay from hourly wage, hours per week, working weeks, and optional weekly overtime hours.
- Salary to Hourly CalculatorConvert annual salary to an effective hourly rate using hours per week, unpaid weeks off, and holiday hours. Compares to a naive 40×52 rate.
- Overtime Pay CalculatorEstimate overtime pay using a single hourly rate, or a FLSA weighted-average regular rate when you worked two different rates in the same week.
- Timesheet CalculatorAdd up to six timesheet lines with hours and an optional per-line rate. Totals hours and estimated pay at the default rate when a line rate is 0.
- Mileage Reimbursement CalculatorCalculate mileage reimbursement from miles driven. Defaults to the IRS H2 2026 business rate of 76¢ per mile, with charity and medical rates.
Finance calculators
Mortgage payments, auto and personal loans, compound interest, credit card payoff, affordability, and seller fees.
- Etsy Fee CalculatorCalculate Etsy seller fees, offsite ads, payment processing, and what you actually take home. Up-to-date Etsy fee calculator for US and similar shops.
- Mortgage CalculatorEstimate your monthly mortgage payment including principal, interest, property taxes, insurance, and HOA dues.
- Auto Loan CalculatorEstimate a car loan payment and the total interest paid.
- Loan CalculatorCalculate monthly payments, interest, and total cost for a fixed-rate loan.
- Compound Interest CalculatorProject investment growth with compound interest and regular contributions.
- Credit Card Payoff CalculatorEstimate payoff time and interest for a fixed monthly credit card payment.
- Mortgage Affordability CalculatorEstimate a home price from an affordable monthly principal-and-interest budget.
Salary & Work calculators
Convert salary to hourly pay, estimate net pay by state, and annualize wages with the hours you actually work.
- Paycheck Calculator by StateEstimate 2026 take-home pay from gross wages, pay frequency, filing status, and U.S. state. Includes federal brackets, FICA, and a simplified state tax.
- Salary CalculatorConvert an annual salary to hourly, weekly, and monthly pay.
- Hourly to Salary CalculatorConvert an hourly wage into annual, monthly, weekly, and daily pay.
Math calculators
Percentages, midpoints, vector dot products, partial fractions, and Laplace transforms with worked examples.
- Midpoint CalculatorFind the midpoint of two points on a line or in a plane. Also shows distance, slope, and the midpoint formula with a worked example.
- Partial Fraction Decomposition CalculatorDecompose a rational function into partial fractions. Supports proper and improper fractions, real linear factors, and irreducible quadratics.
- Dot Product CalculatorCalculate the dot product of two 2D or 3D vectors, plus magnitudes and the angle between them. Free online vector calculator.
- Laplace Transform CalculatorCompute Laplace transforms and inverse Laplace transforms for standard f(t) and rational F(s). Table-based, with partial fractions for inverses.
- Percentage CalculatorFind what percentage one number is of another.
Education calculators
Grade percent, weighted GPA on a 4.0 scale, and the final exam score you need for a target grade.
Home calculators
Paint, concrete bags, flooring, tile, drywall, roofing, siding, fence, deck, pavers, mulch, gravel, fill dirt, HVAC, water heaters, and solar.
- Paint CalculatorCalculate how much paint you need from wall size, doors, windows, and coats. Get paintable area, gallons, liters, and how many cans to buy.
- Concrete CalculatorCalculate cubic yards of concrete for slabs, footings, columns, walls, and circular pads. Includes cubic feet, cubic meters, bags, waste, and optional cost.
- Gravel CalculatorEstimate gravel cubic yards and tons from length, width, depth, and rock type. Optional cost per ton for driveways, pads, and paths.
- Flooring CalculatorAdd up to four rooms, then calculate flooring square footage, extra material for waste, boxes if you know coverage per box, and optional cost.
- Tile CalculatorCalculate how many tiles you need from room size, tile width and height, grout spacing, and waste. Optional tiles per box and material cost.
- Drywall CalculatorEstimate drywall sheets from room length, width, and height. Subtract doors and windows, add a ceiling, and choose 4×8, 4×10, or 4×12 ft sheets.
- Fence CalculatorCalculate fence panels, posts, sections, and rails from total length, panel width, post spacing, and gates. Optional estimated panel cost.
- Roofing CalculatorCalculate roof area, roofing squares, and shingle bundles from length, width, pitch, number of sections, and waste. 1 roofing square = 100 sq ft.
- Siding CalculatorEstimate vinyl or fiber-cement siding square footage and squares from wall length, height, number of walls, doors, windows, and waste.
- Topsoil CalculatorCalculate topsoil cubic feet, cubic yards, cubic meters, and approximate tons from bed or lawn length, width, and depth.
- Sand CalculatorEstimate sand volume, cubic yards, weight, and tons from length, width, depth, and sand type (play, concrete, masonry, or fill).
- Paver CalculatorCalculate patio or driveway pavers from surface size, paver dimensions, joint spacing, and waste. Optional pieces per pallet or box and material cost.
- Wallpaper CalculatorEstimate wallpaper rolls from wall length, height, number of walls, roll width and length, and pattern repeat. Includes openings and a waste allowance.
- Concrete Bag CalculatorCount 40, 60, or 80 lb concrete mix bags from slab length, width, and thickness. Primary result is bags to buy, with cubic yards if a truck is cheaper.
- Dirt CalculatorEstimate fill dirt cubic yards, cubic meters, and tons from length, width, and depth. Choose dry, compacted, wet, or clay fill — not gravel or topsoil.
- Moving Truck Size CalculatorPick a 10, 15, 20, or 26 ft rental truck from home size or cubic feet. Distinct from a moving-cost quote — this is capacity, not dollars.
- Water Heater Size CalculatorSize a tank or tankless water heater from household size and simultaneous showers. See recommended gallons, first-hour rating, and tankless GPM.
- Pergola Cost CalculatorEstimate pergola cost from size, material, roof style, and DIY vs pro labor. Includes posts, beams, rafters, and hardware.
- Fence Cost CalculatorEstimate fence cost per linear foot for wood, vinyl, chain link, aluminum, or composite, including posts, gates, and install.
- Concrete Slab CalculatorCalculate cubic yards, 60 lb and 80 lb bags, and cost for a concrete slab from length, width, and thickness.
- Gravel Driveway CalculatorEstimate gravel tons, cubic yards, and cost for a driveway or pad from length, width, and depth.
- Mulch CalculatorCalculate mulch bags or cubic yards from bed size and depth, then compare bag price vs bulk delivery.
- Shed Cost CalculatorEstimate shed cost from size, style, quality, foundation type, and DIY vs pro labor, including a permit allowance on larger floors.
- Moving Cost CalculatorEstimate moving cost from home size, distance, packing, and stairs for local hourly moves and long-distance weight-based quotes.
- Dumpster Size CalculatorPick a 10, 15, 20, 30, or 40 yard dumpster from your project type, with rental cost, extra days, and weight cap.
- HVAC Size CalculatorEstimate air-conditioner and heat-pump size in BTU and tons from square footage, climate, ceiling height, insulation, sun, and occupancy.
- Generator Size CalculatorSize a portable or standby generator in watts and kW from home size, essentials vs whole-home backup, HVAC, well pump, range, and dryer.
- Solar Panel Savings CalculatorEstimate solar system size, panel count, net cost after the 30% federal tax credit, payback years, and 25-year savings from your electric bill.
- Tree Removal Cost CalculatorEstimate tree removal cost from height, trunk diameter, proximity to structures, access, stump grinding, and storm urgency.
- Board Foot CalculatorCalculate board feet for lumber from thickness, width, length, and quantity. Instant board foot calculator with cubic feet and cost.
- Roof Pitch CalculatorConvert roof rise and run into pitch (X:12), angle in degrees, slope percent, and rafter length. Free roof pitch calculator for builders and DIYers.
- Deck Material CalculatorEstimate decking boards, joists, posts, concrete, screws, and cost from deck length and width. Free deck material calculator for DIY builds.
- Square Footage CalculatorCalculate rectangular area in square feet for flooring, paint, and room planning.
Everyday calculators
Tips, tax, discounts, age, rent increases, TV size, tires, trip gas, sleep, caffeine, pets, and cooking conversions.
- Rent Increase CalculatorTurn a rent hike into new monthly rent, percent increase, and extra cost per year. Enter a percent or a dollar increase for tenants and landlords.
- TV Size / Viewing Distance CalculatorConvert seating distance to a recommended 4K TV diagonal, or a TV size to a viewing distance. Uses ~30° cinematic angle rules of thumb.
- Tire Size Difference CalculatorCompare two tire sizes (width / aspect / rim). See diameter, circumference, plus speedometer error if you change overall height.
- Gas Trip Cost CalculatorEstimate fuel cost for a road trip from miles, MPG, and price per gallon. Optional round trip and split among passengers.
- Sleep CalculatorFind bedtimes from a wake-up time, or wake times from a bedtime, using 90-minute sleep cycles plus time to fall asleep.
- Caffeine Half-Life CalculatorSee how much caffeine is still in your system and when it will wear down to a quarter-cup or nearly gone. Default adult half-life is 5 hours.
- Dog Age CalculatorConvert dog years to human years with a size-aware chart: 15 the first year, 9 the second, then about 4–7 human years per calendar year.
- Cat Age CalculatorConvert cat years to human years: about 15 at one year, 24 at two years, then roughly four human years per calendar year.
- Cooking Measurement ConverterConvert cups, tablespoons, teaspoons, fluid ounces, ml, grams, ounces, and pounds. Optional ingredient density for volume-to-weight.
- Female Delusion CalculatorEstimate what share of U.S. men match selected age, height, income, race, and relationship filters. A demographic dating-market illustration—not a judgment.
- Tattoo Price CalculatorEstimate tattoo cost from size, style, color, placement, and artist hourly rate. Includes shop minimum, sessions, and a 20% tip.
- Age CalculatorCalculate age in years, months, days, and total days.
- Date Difference CalculatorFind the number of days, weeks, and hours between two dates.
- Tip CalculatorCalculate a tip, total bill, and amount per person.
- Discount CalculatorFind a sale price and savings after a percentage discount.
- Sales Tax CalculatorCalculate sales tax and the final price for any local tax rate.
Tech calculators
CPU vs GPU bottleneck percentage by resolution and Twitch Bits to USD for streamers and viewers.
- Bottleneck CalculatorCheck CPU vs GPU bottleneck percentage for gaming at 1080p, 1440p, 4K, or 8K. Instant PC bottleneck calculator with FPS estimate.
- Twitch Bits to USD CalculatorConvert Twitch Bits to USD for streamers and viewers. See payout at $0.01 per Bit, typical purchase cost, and Cheer badge tiers.