40 calculators · browser-based
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A network of single-purpose tools with visible math, assumptions, and practical limits. Calculators that rely on regulatory, dataset, or manufacturer values identify those published references.
Minimum run 144 inches; total footprint 22 feet; minimum width 36 inches; handrails required.
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Home project costs
Project-cost planning guide →- 01 Roof Replacement Cost Re-roof price by size, pitch, material, and tear-off.
- 02 Kitchen Remodel Cost Budget to luxury, by size, scope, and cabinet choice.
- 03 Bathroom Remodel Cost Half-bath to primary suite, with tub-to-shower conversion.
- 04 HVAC Replacement Cost Furnace, AC, heat pump, or mini-split, by efficiency tier.
- 05 Window Replacement Cost By count, frame material, glass, and install type.
- 06 Deck Cost Wood vs composite, by the square foot, plus railing and stairs.
- 07 Fence Cost By linear foot, material, height, and gates.
- 08 Flooring Cost Install price by room and material — laminate, LVP, hardwood, tile.
- 09 Siding Replacement Cost Vinyl to fiber-cement, by wall area, stories, and tear-off.
- 10 Driveway Cost Gravel, asphalt, concrete, or pavers — by the square foot.
- 11 Water Heater Cost Tank, tankless, or heat-pump — installed, with upgrade adders.
- 12 House Painting Cost Interior or exterior, by area, prep, coats, and stories.
- 13 Gutter Installation Cost By linear foot, material, guards, and stories.
- 14 Insulation Cost Batt, blown-in, or spray foam — by area and R-value.
Construction & trades
Construction calculator guide →- 15 Concrete Volume Cubic yards, bags, and ready-mix for slabs, footings, and columns.
- 16 Paint Coverage Gallons of paint and primer by room, coats, and surface texture.
- 17 Drywall Sheets Sheets, screws, joint compound, and tape for walls and ceilings.
- 18 Stair Stringer Risers, treads, and stringer length with IRC and IBC checks.
- 19 Rebar Lap Splice Tension splice length using cited ACI 318 provisions.
- 20 Tile Waste & Pattern Order quantity by layout, including diagonal and herringbone waste.
- 21 ADA Ramp Slope Run, landings, width, and handrails using ADA 2010 Section 405.
- 22 Room BTU Load A transparent single-room heating and cooling sizing estimate.
Outdoors, lawn & energy
- 23 Solar Panel Tilt Tilt, azimuth, monthly production, and seasonal-adjustment value by representative-metro ZIP.
- 24 Solar Panel Cost Installed price, annual savings, and payback with no 2026 federal residential credit assumed.
- 25 Generator Sizing Running and starting watts by appliance → the size to buy.
- 26 Landscaping Cost Sod to full design and hardscape, by the square foot.
- 27 Grass Seed Pounds and bags by lawn size, seed type, and new vs overseed.
- 28 Gravel & Mulch Cubic yards, tons, and bags for gravel, mulch, soil, and stone.
- 29 Hive Expansion Timing Add a super, split, feed, or treat — by USDA zone and month.
Water care
Welding & fabrication
Welding calculator guide →- 32 Welding Rod & Wire Estimate stick electrodes or MIG wire from finished joint geometry and process purchase factors.
- 33 MIG Weld Deposition Rate Convert solid-wire diameter and known WFS into deposited lb/hr, arc time, and a whole-spool purchase plan.
- 34 Welding Heat Input Calculate arc energy and estimated heat input in kJ/mm and kJ/in from volts, amps, and travel speed.
- 35 Shielding Gas Duration Estimate usable arc hours, elapsed shop time, and shifts remaining from a cylinder.
- 36 Welding Time & Cost Turn weld length, passes, travel speed, labor, gas, and consumables into a transparent direct-cost estimate.
- 37 MIG Welding Job Estimator Connect joint geometry, solid-wire deposition, arc time, labor, gas, and package cost in one transparent estimate.
Latest guides
The reasoning behind the numbers
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Welding · Job estimating
How to Estimate a MIG Welding Job Without Guessing
Build a MIG welding estimate from joint volume, wire deposition, arc-on time, labor, gas, and package cost—then add overhead and profit separately.
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Auto · Maintenance
How Much Car Maintenance Really Costs (by Vehicle, Age & Mileage)
What a car actually costs to keep on the road each year — by vehicle class, age, mileage, brand reliability, and your local labor market — with a low-high range and a monthly set-aside.
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Guide · Renovation Costs
Home Renovation Cost Guide 2026: What Major Projects Really Cost
A 2026 cost guide to 16 of the most common home renovation projects — roofing, kitchens, baths, HVAC, siding, solar and more — with real price ranges and a calculator for each.
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