Hammer Construction Calculator

Transform complex construction math into simple solutions. HammerCalc is the only calculator built specifically for professionals who work with mixed units, fractions, and real-world measurements. Includes suite of specialized tools, notes system, plan viewer & much more.

Why professionals choose HammerCalc:

Multi-Unit Math Made Easy • Mix feet, inches, millimeters, and meters in a single calculation. No more converting units or switching between calculators. Just enter your measurements naturally and get instant, accurate results.

Built for Speed • Tape Measure Widget - Input fractions faster than typing • Custom fraction rounding (1/16", 1/32", 1/64", or decimal) • Pin your most-used tools for one-tap access • Quick Links for instant access to your favorite resources

Specialized Professional Tools • Square Footage - Area calculations • Stair Calculator - Rise, run, stringers, and code compliance • Rafter Calculator - Ridge height, cuts, and angles • Roof Calculator - Pitch, rise, run, and rafter lengths • Circle & Arc Layout - Radius, chord, segments, and angles • Triangle & Polygon - Right triangles, oblique angles, regular polygons • Square Footage - Area calculations • Rectangle Layout - Dimensions, diagonals, and squaring

What-If Controls & Visual Diagrams • Every tool includes interactive sliders and visual references that update in real-time

Integrated Plan Viewer • Load PDFs directly in the app - no more switching between apps • Auto-saves zoom level, page number, and position for each plan for quick referencing between plans and calculator • Work with multiple plans simultaneously

Notes System • Add calculations directly to notes with one tap • Create unlimited notes for different projects • Full calculation history with timestamps

Professional Features • Mix decimals and fractions in any calculation • Dark mode for low-light job sites • Customizable theme colors • Imperial, Metric, or Mixed unit modes • Lock key parameters while exploring options • Converts results between units with one tap

Perfect For: Carpenters • Contractors • Engineers • Machinists • Architects • Designers • Estimators • Inspectors • Anyone who works with precise measurements

Risk-Free 7 Day Trial Try our professional calculator free for 7 days. No commitment required.

Note: A subscription is required to access HammerCalc’s features after the trial. Pricing and availability vary by region.

Subscription Details 7-Day Free Trial: Unlock the power of HammerCalc for free for 7 days, then choose US$3.99/month or US$24.99/year in the US (pricing varies by region) Auto-Renewal: Automatically renews unless canceled 24 hours before the trial or billing period ends. Manage Subscription: Adjust or cancel anytime in Settings > [Your Apple ID] > Subscriptions.

Support: Contact us at hammercalc@gmail.com for help.

This app is subject to our Terms of Use, available at: https://www.hammerstorm.co/terms To view our privacy policy, please visit: https://www.hammerstorm.co/privacy