Workshop Calculator App for Android
Workshop
Calculations
Without the
Guesswork
Calculate bolt torque values, find tap drill sizes, convert metric and imperial measurements, and access machining references — offline on Android.
Launching Soon on Google Play
- Torque Calculator
- Drill & Tap
- Feeds & Speeds
- Unit Converters
- Offline
- 40+ Thread sizes
- Metric & Imperial Both thread standards
- 50+ Unit conversions
- Offline No account required
Calculators & References
Workshop Calculators and Machining References
Torque calculations, drill and tap sizing, unit conversions and workshop references — built for machinists, mechanics and fabricators.
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Torque Calculator
Calculate estimated bolt torque values for dry and lubricated fasteners. Guided inputs for thread system, fastener size, grade, material and lubrication — with a full equation breakdown.
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Drill & Tap Calculator
Find recommended tap drill sizes and thread pitches for metric and imperial threads. Correct drill bit sizing before you cut — reduce scrap and avoid re-tapping.
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Unit Converters
Convert workshop measurements including length, torque, pressure, temperature and speed. Metric to imperial and back — Nm to ft-lb, mm to inches, bar to PSI and more.
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Machining Feeds & Speeds
Calculate RPM and feed rate for turning and milling operations. Guided inputs for material, tool type, diameter and cut style — with recommended starting values.
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Saved Calculations
Save torque results, machining setups and workshop calculations for quick reuse. Fewer mistakes between repeat jobs and shifts.
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Quick References
Fast access to tap drill charts, bolt grades, torque sequences and workshop reference data — decimal to fraction, Metric, UNC and UNF thread standards.
Product
Torque Results, Tap Drill Charts and Machining References — Real App Screens
Calculated torque values with full equation breakdowns, tap drill reference charts and machining results — exactly as they appear in the app.
Built for the floor
For Machinists, Mechanics and Fabrication Trades
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Bolt torque calculations at the fastener
Thread system, fastener grade, material, lubrication and clamping condition — estimated torque values with a full calculation breakdown, instantly on your phone.
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Tap drill sizes without the reference charts
Metric and imperial thread sizing, correct drill bit recommendations and tap pitch data — no binder, no lookup table required.
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Unit conversions for mixed-standard workshops
Nm to ft-lb, mm to inches, bar to PSI — where your prints, gauges and machines use different measurement systems.
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Fully offline — no account needed
Works in the pit, the plant, the workshop floor. No Wi-Fi, no mobile data, no login, no subscription.
Engineered for the trade
Built for Real Workshop Conditions
Designed to work the way workshops actually work — fast access beside the machine, no setup, reliable where other tools fail.
Offline — No Signal Needed
Every calculator and reference table works without Wi-Fi or mobile data. Reliable in the pit, the plant, the basement — anywhere signal drops.
No Account Required
Open the app and start calculating. No login, no subscription, no account setup — full functionality from the first launch.
Usable With Gloved Hands
Large touch targets and high-contrast layouts designed for the workshop floor — dirty hands, poor lighting, time pressure.
Fast Reference Access
Bolt torque values, tap drill sizes and unit conversions in seconds — faster than a reference manual or searching online mid-job.
About Torque Toolbox
Workshop Utilities for Machinists, Mechanics and Fabricators
A professional workshop calculator app for Android, built for machinists, mechanics, fitters and turners, fabrication workers and maintenance trades.
Torque Calculator
Guides you through thread system, fastener size, grade, material, lubrication condition and application type — producing estimated bolt torque values for both dry and lubricated assemblies, with a full equation breakdown for every result.
Drill & Tap / Tap Drill Charts
Recommended tap drill sizes for metric and imperial threads. Enter a thread designation and get the correct drill bit size for threading, the thread pitch and thread details. Built-in charts cover Metric, UNC and UNF thread standards with a full searchable reference table.
Unit Conversions & Feeds and Speeds
Workshop unit conversions cover length, torque, force, pressure, temperature, speed, area and volume — Nm to ft-lb, mm to inches, bar to PSI, °C to °F and more. The machining feeds and speeds calculator produces recommended RPM and feed rates for turning and milling operations.
Offline & Saved Calculations
All calculators and reference data work fully offline with no internet connection or account required. Results and setups can be saved for quick reuse across repeat jobs and ongoing maintenance.
Free on Android
Take Torque Toolbox to Your Next Job
Bolt torque calculations, tap drill sizing, unit conversions, machining feeds & speeds and workshop references — always in your pocket, always offline. Free on Android, no account required.
Get it on Google Play