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Yamate › Tradie calculators

Free tradie calculators

Work out materials, sizes and rates on site. Australian figures and standards, not converted American ones. Free, no sign-up.

All 42 calculators

Concrete & masonry

Concrete volume & bags Cubic metres, 20kg bags and the ready-mix order for slabs, footings and post holes. Measurements & coverage rates Concrete mix ratio Cement, sand and aggregate for a site-mixed batch, by AS 1379 strength grade. Measurements & coverage rates Bricks & blocks How many bricks or blocks a wall takes, with waste. Measurements & coverage rates Mortar Sand, cement and lime for brickwork and blockwork by mix class. Measurements & coverage rates Plaster & render Bags of render, screed or plaster for a wall or floor at your thickness. Measurements & coverage rates

Framing, decks & stairs

Timber & lineal metres Lineal metres and stock lengths from a covered area. Measurements & coverage rates Wall framing & stud spacing Studs, plates and noggins at your spacing, with total lineal metres. Follows an Australian Standard Ceiling & floor R-value What R-value your ceiling or floor needs, by NCC climate zone. Follows an Australian Standard Decking Boards, joists, bearers and fixings for a deck. Follows an Australian Standard Stairs Rise, going, 2R+G and stringer length against the NCC ranges. Follows an Australian Standard Balustrade spacing Fewest balusters that keep every gap under the 125mm rule. Follows an Australian Standard

Roofing & guttering

Roof area & sheets True roof area from plan size and pitch, and the sheets to order. Measurements & coverage rates Roof pitch Degrees, percentage, 1-in-N and rafter length — all four, one input. Measurements & coverage rates Gutter & downpipe sizing Flow from catchment and rainfall, and how many downpipes it needs. Follows an Australian Standard

Tiling & painting

Tiles, grout & adhesive Tiles, boxes, grout and adhesive with pattern waste built in. Measurements & coverage rates Paint coverage & cost Litres, the cheapest tins to buy and what it costs — per room. Measurements & coverage rates

Plumbing

Hot water system sizing Storage size or continuous flow rate for a household. Follows an Australian Standard Pipe fall & drainage grade Fall in mm over a run, and invert levels, by pipe size. Follows an Australian Standard Water pipe sizing Loading units to flow rate to a pipe size, with a velocity check. Follows an Australian Standard Rainwater tank size Litres needed from your roof area, BOM rainfall and your usage. Measurements & coverage rates

Electrical

Voltage drop & cable size Drop over a run against the AS/NZS 3000 5% limit — not the US rule. Follows an Australian Standard Maximum demand & mains size Maximum demand by group, and the mains rating it points to. Follows an Australian Standard Conduit fill Smallest conduit that keeps your cables under the space factor. Follows an Australian Standard Air conditioner sizing A kW starting point by room size and climate. Rule of thumb, not a standard. Rule of thumb — not from a standard Solar system size Panels in kW from your daily use, your roof space and your city — shows which one is really the limit. Measurements & coverage rates Smoke alarm count & placement How many alarms your home needs and where, by storeys, bedrooms and hallways. Follows an Australian Standard

Landscaping & outdoor

Mulch Cubic metres, tonnes and bags for a bed at your depth. Measurements & coverage rates Topsoil & raised-bed soil Soil volume for a spread or a raised bed. Measurements & coverage rates Gravel, sand & aggregate Order weight and volume for road base, gravel, sand or pebble. Measurements & coverage rates Turf & grass seed Slabs, pallets or seed, plus the underlay soil people forget. Measurements & coverage rates Fencing Posts, rails, palings and the concrete for the holes. Measurements & coverage rates Retaining wall blocks Blocks, caps, base and drainage — and when to call an engineer. Follows an Australian Standard Shade sail size Sail cut size from post spacing, hardware allowance and fall for run-off. Measurements & coverage rates

Access & other

Ramp gradient Run, landings and footprint at the AS 1428.1 1:14 gradient. Follows an Australian Standard Dilution ratio Concentrate and water for a 1:N ratio, without the off-by-one. Measurements & coverage rates Skip bin size Cubic metres from trailer loads or wheelie bins — plus the weight limit that catches people out. Measurements & coverage rates

Money & business

Charge-out rate What to charge per hour to cover your costs, super and take-home pay. Measurements & coverage rates Quote from cost + margin Turn a job cost into a price at the margin you want — markup and margin are not the same number. Measurements & coverage rates GST Add 10% GST to a price, or find the GST already inside a total. Measurements & coverage rates Tax set-aside How much of your income to put aside for tax, at current ATO rates. Measurements & coverage rates Cents-per-km vehicle claim Your ute or van deduction at the current ATO rate, capped at 5,000 km. Measurements & coverage rates Payday super due date The date super has to land in the fund — 7 business days after payday, 20 for a new employee's first pay. Follows an Australian Standard
Why we built these in metric, to Australian rules. Most free trade calculators online are American. That's fine for a paint tin and badly wrong for anything a code touches: Australia limits voltage drop to a flat 5% end to end where the US splits 3% and 5%, and Australian access ramps are capped at 1:14 where the American rule is 1:12. Build an Australian ramp off an American calculator and it's too steep. Every number here starts from an Australian source.

Calculators by trade

Tap a trade above to filter, or jump straight to how Yamate handles the paperwork for your trade:

Carpenters · Painters · Tilers · Plumbers · Electricians · Landscapers · Handymans · Cleaners · Concreters · Roofers · Bricklayers · Plasterers · Air conditionings

What these can and can't do

They do the measuring-up sum quickly and show you the working, so you can sanity-check it against your own experience. They're a starting point for ordering materials and pricing a job.

What they don't do is sign anything off. Where a calculator follows an Australian Standard we say which one and where the figures came from, and we say plainly when there isn't a standard behind it at all. Anything that needs a certifier still needs a certifier.

Worked out the materials. Now price the job.

Yamate turns the numbers into a quote your customer can accept on their phone, then an invoice, then a payment — with the GST handled and the follow-ups chased for you.

Try Yamate free → Free to try · no card · sign in with a link, no password to remember

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Tradie calculator FAQ

Are these calculators free?

Yes — all thirty, no sign-up, no limit, no card. They run in your browser and your figures never leave your phone.

Do they work offline?

Once the page has loaded, the sums run on your device. Handy in a basement or out of range.

Are they metric?

Yes. Metres, millimetres, litres, kilograms and cubic metres — the units you actually order in.

Can I use these for a job that needs council approval?

Use them to work out quantities and to sanity-check a design. Anything that needs sign-off needs your certifier or building surveyor — a calculator is a fast sum, not an approval.

Which ones follow an Australian Standard?

Each calculator carries a badge saying whether it's plain measurement, whether it follows an Australian Standard, or whether it's a rule of thumb with no standard behind it. We'd rather say "there isn't a standard for this" than dress a rough guide up as one.

General information for Australian trades, and an estimate only — not tax, financial or legal advice. It is not engineering, building or design advice either: a calculator works out a quantity from the figures you enter, and anything that needs sign-off still needs your engineer, certifier or building surveyor. Australian Standards are published and sold by Standards Australia and are not reproduced here; figures follow published guidance and can change between editions. Always confirm quantities with your supplier and anything code-related with your certifier.