Calculate → enter 5′ 7 1/2″ + 2′ 4″ → Calculate =.
Built for iPhone & iPad
From the first
measurement.
To the final
job sheet.
Construction math, clear layouts and the whole job in one place. Measure, plan, mark up a photo and keep the answer for next time.
7 daysFree to try. $4.99 once to keep.
No automatic charge · U.S. lifetime price
No automatic charge · U.S. lifetime price
32 construction toolsWorks offlineNo account or adsNo subscription
01 / Calculate with confidenceYour units.
Your units.
Your way of working.
Feet and inches, fractions, metric, areas and volumes. Put them in an expression, keep your result and use it in the next step.
Choose Add-on / discount for Percentage (%) behavior. Enter 137sqft + 10%, then Calculate =.
Calculate → enter 1′ + 25.4mm → Calculate =. Compatible units combine in one expression.
Parentheses & powers Trig & inverse trig Repeat equals Copy & reuse results
A number you can pictureKnow what
Know what
you’re measuring.
A diagonal is more useful when you can see where it belongs. TradeCalc pairs calculations with interactive diagrams. Tap a numbered marker to highlight its measurement, then adjust an input and watch the results change.
Use the same Square-up workflow here: select Run or Rise, choose an adjustment step, then use the slider or plus and minus. Exact opens its measurement field. Undo and Redo recover edits. The numbered Diagonal marker highlights the calculated result.
See all the layout toolsDiagonal15′ 0″
Tap a measurement to explore
Live
12′ 0″
Details & all results (6)
Side view · diagonal joins the ends of the run and rise
- Diagonal
- 15′ 0″
- Slope angle
- 36.87°
- Complement
- 53.13°
- Pitch / 12
- 9
- Grade
- 75 %
- Area
- 54 ft²
Measurements
Feet, inches, fractions or metric. Bare numbers mean inches.
Display settings
Square-up example · select a numbered measurement, adjust it, or use Exact. Diagonal is a calculated result; selecting it highlights the diagram.
More room for the workMade for your iPad.
Made for your iPad.
Ready for your workbench.
Keep the live diagram beside your measurements. Compare a result without scrolling away from the input that changes it.
A calculator with its tape beside it.
Keep the expression and previous calculations in view. Cut planning and saved layouts make use of the extra space, too.
A layout that fits your window.
Rotate or resize the app. Wider windows use columns; smaller windows and larger accessibility text reflow to one column.
Your tools within reach.
Browse a wider tool library. On iPadOS 18 and later, adaptable navigation adds a sidebar in wide windows.
Supports iPadOS 17 and later. Sidebar navigation requires iPadOS 18 or later.
02 / Keep the real-world contextThe measurement.
The measurement.
The photo.
The whole story.
Save the answer with the opening, wall or detail it belongs to. A photo makes “that measurement from yesterday” much easier to find.
- Attach up to 12 photos to a saved calculation.
- Draw arrows and place measurement labels.
- Pick a value from the calculation or write your own.
- Move or edit marks, then undo and redo changes.
- Add captions, share a marked photo or include it in a PDF.
Photos are references. Measurements come from your inputs, not automatic image measurement.
Less scrolling. More doing.Take the layout
Take the layout
to the material.
Open Marking view for a readable list of positions and measurements. Work down the list without losing your place.
Tap. Mark. Move on.
Tap anywhere on a card to check it off. A visible count keeps track of your progress.
Keep the screen with you.
The sun button keeps the display awake for ten minutes. “Screen stays on” makes the setting clear.
No signal required.
Calculations, saved jobs and the Field Guide stay available offline.
Checkmarks reset when you leave Marking view. Keep-awake ends when you leave the app. Internet is needed to start or restore trial and purchase access.
03 / Bring the job togetherA workshop.
A workshop.
Not a pile of numbers.
Keep editable calculations, notes, plans and photos organized by job. Revisit an input without starting the whole calculation again.
Give every job a home.
Save a sheet, name the job and add the details that make the result useful later.
Workshop → Manage folders organizes jobs. Saved layouts, notes and attachments appear in their own sections.
Keep the plans close.
Import PDFs and photos into job folders. The PDF viewer remembers your page, zoom and position; zoom into photo details when you need them.
Start with the last good answer.
Edit or duplicate saved calculations, pin the important ones and search names, jobs, notes and photo captions.
Plan before you purchasePut the material
Put the material
and the money on paper.
Go from quantities to a practical cutting plan or estimate. Use the stock you have, enter the prices you pay and share a clear job sheet.
Your supplier prices. Right in the calculation.
Enter prices directly in 12 material and framing tools. See whole-container alternatives for paint, compare bagged concrete with ready-mix, or total the components you have priced.
One switch for all of them: Settings → Show material pricing. Hide costs when you just need quantities; your entered prices are kept for next time.
Pricing is included in
- Paint
- Concrete
- Columns & cones
- Roof materials
- Wall framing
- Deck boards
- Fence
- Board feet
- Drywall & siding
- Tile & flooring
- Masonry
- Weight & volume
Material estimates are before tax. Delivery, supplier minimums and unpriced components are separate. Alternative purchase methods are compared, not added together.
Cut lists that know your stock.
Enter required pieces, available board lengths, offcuts and quantities. Allow for the width of the saw cut and compare plans using material use or purchase cost.
Workshop → Cut optimizer. Enter pieces and stock, choose a planning preference, then tap Optimize stock.
- Use finite stock and offcuts already on hand.
- Allow new stock purchases when needed.
- Enter per-length board prices in USD.
- See unassigned pieces and purchase subtotals.
Cut planning compares practical arrangements. It does not guarantee the lowest possible cost or waste.
Quantities become an estimate.
Build a takeoff with material lines and remembered unit prices. Add labor, markup and tax, then export a PDF under your company or workshop name.
Workshop → Takeoffs & quotes → New estimate. Add material lines, set labor, markup and tax, then choose Create quote PDF.
- Keep material lines editable as the job changes.
- Set labor, markup and tax for your estimate.
- Choose whether labor is included in the taxable amount.
- Export a readable PDF to share or file.
The full toolbelt32 tools.
32 tools.
One place to find them.
Open a category to see every calculator. These are included alongside Calculate, saved jobs, photo markup, cut lists and estimates.
01LayoutGet the geometry right.11 tools
From a room diagonal to evenly spaced panels, railings and curves.
Equal spacing
Choose piece count, maximum gap or nearest center spacing. Set end offsets, different end-piece widths, and center or edge marks.
Square-up
Enter rise and run to find the diagonal, angle and pitch. Use it to check a rectangular layout.
Area & cutouts
Calculate rectangular areas and subtract openings for practical floor and wall quantities.
Circle & arc
Find circumference, arc lengths, sectors and circular segments from your dimensions.
Regular polygon
Find perimeter, area, center-to-corner and center-to-side distances, interior angles and miter settings.
Oblique triangle
Enter all three side lengths to calculate the opposite angles, area and perimeter.
Degrees, minutes, seconds
Convert an angle entered in degrees, minutes and seconds into decimal degrees.
Inclined balusters
Calculate level gaps and marking positions along a sloping rail.
Stair balusters
Repeat a baluster pattern across stair treads and calculate the different cut lengths.
Right triangle solver
Solve from any two sides, or a side and an angle, rather than always starting with rise and run.
Decimal angle to D:M:S
Convert a signed decimal angle back into degrees, minutes and seconds.
02FramingWork through the tricky parts.9 tools
Stairs, walls and roof geometry with the allowances and references that matter.
Straight stairs
Compare riser counts and available run. Account for tread layers, floor finishes, nosing, headroom and stringer layout.
Common rafter
Work from building span and roof pitch, with ridge thickness, horizontal overhang and cut angles.
Hip & valley
Explore equal or unequal pitches, non-square eave corners and jack lengths for both roof planes.
Wall framing
Count studs, plate runs and sheathing, with optional component prices. Include extra studs for corners and openings.
Rake wall
Find individual stud heights beneath a sloping top, with spacing and plate allowances.
Hip backing & drop
Compare centered, backed hips with shifted, unbacked hips. See roof-plane alignment and edge offsets for supported convex roofs.
Roof cut angles
Calculate backing, sheathing and purlin settings for supported roof geometry and stock orientations.
Arched wall
Use the opening width and circular arch rise to find heights at individual stud stations.
Birdsmouth & HAP
Work through seat, heel and height-above-plate geometry from your rafter inputs.
03MaterialsKnow what goes on the list.11 tools
Turn dimensions into quantities, coverage, volume and material costs.
Board feet
Calculate lumber volume in board feet and apply a unit price for the material total.
Concrete
Estimate volume, bags and weight. Enter bag or ready-mix prices to compare purchase costs.
Columns & cones
Calculate round column or cone volumes, with material bags and weight.
Roof materials
Convert the roof footprint and pitch into sloped area, roofing squares, bundles and sheathing quantities.
Drywall & siding
Account for openings and panel dimensions when estimating drywall or siding quantities.
Paint
Include openings, coats and coverage. Enter one-gallon and five-gallon prices to compare whole-container cost options.
Tile & flooring
Calculate pieces, boxes and layout remainder from room and product dimensions.
Deck boards
Plan board rows, linear footage and joists. Add board and joist prices to estimate the materials you have priced.
Fence
Estimate posts, rails and pickets, with optional component prices and a priced-materials subtotal.
Masonry
Estimate masonry units and courses, including your material allowance.
Weight & volume
Use volume and material density to convert between weight and volume units.
04FinishSet up the finishing cut.1 tool
Crown molding with corner, piece and saw orientation in view.
Crown & miters
Choose inside or outside corners, left or right pieces, and nested, single-bevel or dual-bevel saw setups.
Tools calculate from your inputs. Supported roof and stair configurations have specific reference conventions; the app’s guidance explains their scope. TradeCalc does not certify structural capacity or building-code compliance.
A starting point, built inLearn it.
Learn it.
Then make it yours.
Field Guide examples open the matching calculator with the sample measurements already filled in. Change an input and try the same workflow on your own project.
- 01
Pick an example
Find a familiar job or a tool you want to understand.
- 02
Open the calculation
The app takes you to the tool with the example values ready.
- 03
Try your measurements
Adjust the inputs, inspect the result and save your version.
The little things add upBuilt for the way
Built for the way
a job actually goes.
Undo. Redo. Keep going.
Undo and redo calculator edits, live measurement adjustments and photo marks. Recover a change and keep exploring.
Remember the useful numbers.
Use memory, three saved registers and the calculation tape to pick up where you left off.
Choose your precision.
Choose the step for live adjustments. Display fractions from ½″ to ¹⁄₆₄″ or metric results; rounding does not change stored measurements.
See the reference.
Tap numbered markers to highlight a measurement. Detailed drawings keep labels separated, with a measurement key when space is tight.
Help that goes with you.
Search the Field Guide and read explanations offline, right alongside the tools.
Find your way back.
Favorite tools, search saved work, pin important sheets and duplicate a calculation for the next variation.
Open it with Siri or Shortcuts.
Jump directly to any of the 32 calculators through Siri or a shortcut you set up.
A keyboard belongs on the workbench.
On iPad, use keyboard shortcuts for navigation and undo/redo alongside the wider workspace.
Your work stays yours.
No login. No advertising. No analytics SDKs. Saved work stays on your device. Export a complete workshop backup with plans and photos, then import it when you need to move or restore your work.
Complete backups support up to 64 MB of attached files. Imports merge saved work. Exports and device backups follow the sharing and Apple settings you choose.
Useful tools. An accessible price.Try the whole toolbelt.
Try the whole toolbelt.
Keep it for one price.
Download free and start seven days with every tool. When the trial ends, choose a lifetime unlock to keep using the tools. There is no automatic charge.
$4.99one time, after the trial
U.S. lifetime price. Apple shows the local price before purchase. Existing paid customers keep full access at no extra cost.
Start your free seven-day trial
Install TradeCalc, then choose “Start 7-day free trial.” All 32 tools, saved jobs, photo markup and exports are included.
iPhone & iPad · iOS 17+ · U.S. App StoreGet TradeCalc on the App Store- All 32 construction calculators
- Mixed-unit math, memory, tape, Undo & Redo
- Interactive diagrams, live controls and worked examples
- Saved jobs, notes, PDFs and plan attachments
- Photo arrows and editable measurement labels
- Supplier prices in 12 material/framing tools
- Cut lists, material quantities and estimates
- Responsive iPad workspaces and navigation
- Marking checklists and timed keep-awake
- Offline access and workshop backup/export
No subscription. No ads. Optional one-time lifetime purchase.
A few useful answersBefore you
Before you
put it to work.
What happens after seven days?
The trial stops and no payment is taken automatically. Choose the $4.99 one-time Lifetime Unlock (U.S. price) to keep using the tools. Your saved work stays on your device, and complete workshop backups remain exportable even if you do not unlock.
I already paid for TradeCalc. Do I pay again?
No. Existing paid customers keep full access at no extra cost. Use Restore purchases if you need to recover your access after reinstalling or moving devices.
How do I restore trial or lifetime access?
In Settings, open Trial & lifetime access and choose Restore purchases using the Apple Account that started the trial or purchased the unlock. Restoring or reinstalling does not restart the seven-day trial.
Does it work without a connection?
Yes. Core calculations, saved jobs and Field Guide explanations work offline after trial or lifetime access is verified. Internet is needed to start a trial, buy or restore access, visit support pages, or send files through an online service.
Can I use feet, inches and metric together?
Yes. Length fields accept feet, inches, fractions and metric. Calculate lets you combine compatible units in an expression and work with area and volume. You can also choose your preferred display precision.
Does it measure automatically from photos?
No. Add measurements you have taken or values from a saved calculation. The photo editor lets you annotate and organize them; it does not infer real-world distances from an image.
Can I hide material prices?
Yes. Settings → Show material pricing controls price fields and cost results in all 12 supported material/framing calculators, including saved calculations and exports. Turning it off keeps your entered prices saved.
Can I move my jobs to another device?
Export a complete workshop backup from Settings, transfer the file and import it on the other device. This is a manual backup workflow, not automatic cloud syncing. Complete backups include up to 64 MB of attached files.
Can I use a laser measure or Apple Watch?
This release is for iPhone and iPad. Bluetooth laser-measure integration and an Apple Watch app are not included.
Will it cover every roof or stair configuration?
It supports many practical layouts, including detailed straight stairs and irregular roof calculations, but not every assembly or connection. Read the tool’s references, verify site dimensions and test saw settings on scrap before cutting finished material.