Pro Claculator

Pro Calculator gives you 41 calculators for building work and everyday money in one app. Measure a slab, a room or a roof and see exactly how many bags, sheets, boxes or boards to buy and what they cost. Work out a loan EMI, GST, a discount or a percentage in seconds. It works offline, with no sign-up.

WHY PEOPLE USE IT ON SITE
• Works without signal. Every calculation runs on your phone.
• Answer as you type. No ad ever sits between your numbers and your result.
• Tape-measure keypad: type 12' 6-3/8" exactly as it reads on the tape.
• Imperial and metric: feet, inches and fractions down to 1/16", or metres and millimetres.
• Buy the right amount: waste is added and quantities round up to whole bags, sheets, boxes and lengths, the way material is sold.
• Several rooms in one estimate for paint, flooring, drywall and trim.
• Nothing gets lost: your inputs are kept even if the screen turns off.
• Big buttons and big numbers for gloves and bright sunlight.

CONSTRUCTION CALCULATORS
• Concrete & masonry: Concrete (slabs, footings, walls, round columns), Brick & Block with mortar, Rebar
• Framing & structure: Framing & Lumber, Roofing, Rafter, Stairs, Board Feet
• Surfaces & finishes: Drywall, Insulation, Paint, Tile & Flooring, Baseboard & Trim, Wallpaper with pattern repeat
• Exterior & landscape: Deck, Fence, Siding, Mulch & Topsoil, Sod & Grass Seed, Retaining Wall, Asphalt, Excavation, Gravel & Aggregate
• Electrical, plumbing & HVAC: Wire Size & Voltage Drop, Ohm's Law, Conduit & Box Fill, Pipe Volume & Flow, Room BTU / AC Sizing

MONEY & FINANCE CALCULATORS
• Loan / EMI calculator with yearly schedule and extra payments
• Mortgage / home loan with tax, insurance, PMI and HOA
• Compound interest, savings and SIP-style monthly deposits
• Simple interest, ROI and break-even
• GST / VAT / sales tax: add tax or remove it from a price
• Percentage: percent of, percent change, increase and decrease
• Discount, markup and margin, tip and bill split

HANDY TOOLS
Tape-measure math with feet, inches and fractions, Square-up / diagonal (3-4-5), Slope, grade and ramp, and a Unit converter.

SAVE, SHARE AND EXPORT ESTIMATES
• Save estimates by project and client and see project totals.
• Send them as text, a CSV spreadsheet or a PDF with your company name.
• Add a labour line (hours × rate) to any estimate.
• Back up everything to a file you keep, and restore it on a new phone.

CHECK THE MATHS
Every calculator shows its formula, its assumptions and how it rounds, so you can trust the numbers and explain them to a client.

OFFLINE REFERENCE CHARTS
Nail and screw sizes, drill and tap sizes, nominal vs actual lumber, R-values, roof pitch angles, rebar sizes and weights, and mortar mixes.

PRIVATE BY DESIGN
No account and no login. Your estimates, clients and prices stay on your phone; we never receive them. The app is free and shows ads, and asks for your consent where the law requires it.

12 LANGUAGES
English, Hindi, Gujarati, Kannada, Bengali, Urdu, Arabic, Japanese, Russian, French, Spanish and German, with right-to-left layout for Arabic and Urdu. Menus, calculator names, settings and safety notes are translated; the fields and results inside each calculator are in English for now.

MADE FOR
Contractors, builders, carpenters, masons, tilers, painters, electricians, plumbers, site engineers, DIY home renovators, and anyone who needs a quick loan, GST or percentage answer.

PLEASE NOTE
Results are estimates for planning. Check quantities against site conditions, your supplier's product sizes and local building and electrical codes. Electrical results are guidance only: use a licensed electrician. Finance results are estimates, not financial advice; your bank's or lender's figures are final.