Free, without tiers
Every calculator is free to use. There is no subscription, premium tier, or account wall.
Measure twice. Calculate once.Measure your space.
Measure your space.
Plan what to buy.
Draw an irregular room, work out material quantities, compare product coverage and print a shopping worksheet. Free tools, visible math and no account required.
25 calculators and planning toolsBrowser-side mathIllustrative cost scenarios
Choose your project
New: plan multiple roof faces, product packages and supplier quotes →
Draw or measure a space, choose exact product coverage, compare purchase prices and print a materials checklist. Free and browser-based.
Room renovation
Connect flooring or tile, paint and trim to a measured room.
Concrete patio
Compare bag yield and ready-mix quotes, with supplier checks.
Open-run fence
Organize runs, a gate, shared posts and post-hole concrete.
L-shaped room walkthrough · Patio purchase walkthrough · Fence planning walkthrough
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Popular calculators
Our most useful tools for planning materials, costs, and dimensions.
Home & Construction
Concrete Calculator
Estimate concrete volume, ready-mix yards, and bag quantities for rectangular or circular projects.
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Home & Construction
Fence Calculator
Estimate panels, posts, rails, gates, and waste for a fence run.
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Home & Construction
Gravel Calculator
Calculate cubic yards and tons for driveways, paths, and landscape projects.
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Home & Construction
Flooring Calculator
Estimate flooring area, waste, and the number of boxes to purchase.
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Home & Construction
Tile Calculator by Shape
Estimate square footage, tiles or sheets, waste, and full boxes across common tile shapes.
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Automotive
Tire Size Calculator
Compare two metric tire sizes for diameter, circumference, percentage difference, and speedometer effect.
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3D Printing
3D Print Cost Calculator
Estimate a 3D print’s material, electricity, machine-time, overhead, and marked-up selling price.
Open calculator →
Full directory
25 toolsAll calculators
Need a complete shopping worksheet? Guided room, patio and fence plans · Roof material planner.
Interactive Room & Floor Plan BuilderHome & Construction→Post Hole Concrete CalculatorHome & Construction→Concrete Footing CalculatorHome & Construction→Driveway Cost CalculatorHome & Construction→Fence CalculatorHome & Construction→Gravel CalculatorHome & Construction→Roofing CalculatorHome & Construction→Roof Square Footage CalculatorHome & Construction→Asphalt CalculatorHome & Construction→Deck Cost CalculatorHome & Construction→Board Foot CalculatorHome & Construction→Flooring CalculatorHome & Construction→Tile Calculator by ShapeHome & Construction→Paint CalculatorHome & Construction→Mulch CalculatorHome & Construction→Concrete CalculatorHome & Construction→Concrete Slab CalculatorHome & Construction→Concrete Bag CalculatorHome & Construction→Cubic Yard CalculatorHome & Construction→Stair CalculatorHome & Construction→Square Footage CalculatorHome & Construction→3D Print Cost Calculator3D Printing→Generator Size CalculatorHome & Construction→EV Charging Cost CalculatorAutomotive→Tire Size CalculatorAutomotive→
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Transparent by default
See how we review our work →Each tool shows its formula, assumptions, and worked example.
Why CalcCaddy
Useful answers you can check.
Practical calculators should explain the result, protect your inputs, and be honest about what an estimate cannot promise.
See the math
Formulas, assumptions, units, and worked examples stay visible so you can check the answer.
Plan with local context
Use your own product quotes in project worksheets. Other material tools show clearly labeled illustrative scenarios, not measured local prices.
Your inputs stay in the browser
Calculator measurements run on your device and are not saved by CalcCaddy as project records.
Check our work
Reviewed dates, sources, methodology, and editable assumptions show where the numbers come from.
Clear about the limits
Results are planning estimates—not supplier quotes, code approval, or professional engineering advice.
Built for trust25 tools · 25 practical guides · no sign-in
Straight answers
Before you use a result
What CalcCaddy costs, how the calculations work, and where the limits are.
Is CalcCaddy really free?
Yes. Every calculator and the currently available website embeds are free to use. CalcCaddy has no subscription or premium tier.
How accurate are the calculators?
Each tool applies its displayed formula to the measurements and assumptions you enter. Real projects vary, so verify critical quantities, safety decisions, codes, and purchase amounts independently.
Does CalcCaddy save my project measurements?
No. Calculator inputs are processed in your browser and are not stored by CalcCaddy as project records. Read the privacy policy for the limited operational and anonymous usage data the site may process.
Where do regional material prices come from?
Supported tools adjust illustrative dollar assumptions with a broad 2023 state-level goods-price index. Those assumptions are not measured market prices, live retailer prices, bids or quotes. See the full methodology.
Can I put a calculator on my own website?
Yes. Free responsive embeds are available for concrete, 3D-print cost, and EV charging cost, with more planned. Browse the embed directory.
How can I report a problem?
Email contact@calccaddy.com with the calculator link, inputs used, result received, and what you expected. Confirmed issues are corrected and reviewed again.