Money & investing guides
Mortgage, payoff, ROI, and cash-flow tools help you evaluate loans, budgets, and growth scenarios in seconds.
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Crush the math that slows you down.
From mortgage payments and ROI to drywall takeoffs, pace charts, and tricky time conversions—AllTheCalculations.com gives you ready-to-use answers with zero popups or paywalls. Every calculator includes formulas, examples, and FAQs so you can trust the number you grab.
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What can you solve?
Find the extra payment needed to knock years off your mortgage.
Calculate how many drywall sheets you need for a basement remodel.
Split a trip bill with tax, tip, and multiple currencies.
Figure out lift-off velocity, VO2 max, or time between lab experiments.
Used by homeowners, creators, athletes, and analysts worldwide.
Home & DIY planning
Accurate takeoffs for concrete, drywall, roofing, mulch, and more so your next project is scoped before the first trip to the store.
Science, tech, & fitness
Explore physics, conversions, VO2, macros, pace, and time-math calculators that answer the questions Google sends our way.
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Whether you’re tackling debt payoff, estimating materials, or crunching VO2, each pillar below includes deep-dive tools plus related links so you can jump straight to the math you need.
Unit Conversions•25+ tools
Scale any recipe without guessing
Instant volume, weight, distance, and temperature conversions for kitchens, workshops, labs, and travel planning.
Finance Calculators•20+ tools
Know your payment before shopping
Plan mortgages, auto loans, payoff timelines, and savings growth before you call a lender or adviser.
Construction & Home•20+ tools
Order the right amount of concrete
Concrete, drywall, decking, roofing, and landscaping calculators that help you buy the right amount the first time.
Example calculators
Everyday Math•15+ tools
Leave the right tip and divide the bill
Quick tools for tipping, discounts, bill splits, countdowns, pace plans, and other daily math moments.
Example calculators
Fitness & Health•10+ tools
Set calorie and macro targets
Non-medical fitness tools for BMI, BMR, TDEE, pace, VO2, macro splits, and hydration planning.
Example calculators
Science & Engineering•10+ tools
Validate circuit designs
Physics, chemistry, and electronics calculators like density, Ohm's law, resistor color codes, and gas laws.
Example calculators
Time & Scheduling•12+ tools
Count business days until a due date
Business-day, date difference, and planning calculators that keep deadlines, countdowns, and follow-ups on track.
Example calculators
Cooking & Recipe Math•10+ tools
Scale a recipe up or down smoothly
Recipe scalers, pan swaps, hydration ratios, and ingredient converters built for real kitchens.
Example calculators
Tech & Performance•10+ tools
Plan how long large transfers take
Download time, data transfer, storage, and display math calculators for creators, IT teams, and hardware nerds.
Example calculators
Featured picks
Most-requested calculators this week
Bookmark these high-traffic tools or jump to a category hub to browse every calculator we’ve launched.
finance
Mortgage Payment Calculator
Estimate your monthly mortgage payment, total interest, and payoff schedule with one input-driven tool.
Open calculator →finance
Mortgage Payoff Calculator
Estimate how many months it will take to pay off your mortgage when you make a fixed monthly payment.
Open calculator →finance
Loan Payment Calculator
Calculate the monthly payment for any personal, auto, or student loan using the principal, APR, and term.
Open calculator →finance
Compound Interest Calculator
See how fast your savings grow when interest compounds daily, monthly, quarterly, or annually.
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Hot off the roadmap
We publish new calculators every wave—here are the latest to go live across finance, construction, science, and more.
Why people bookmark us
A calculator library that saves clicks (and headaches).
Answers in seconds
No email gates or PDF downloads—just punch in your values and you’re done.
Everything documented
Every tool includes formulas, how-to steps, FAQs, and disclaimers so you can cite it anywhere.
Updated constantly
We add new calculators every wave. You can even request one via the contact page.