Worldwide mortar mix calculator
Mortar Mix Calculator
Calculate sand, cement and lime quantities for common mortar mixes - a recipe bar shows the mix ratio at a glance, and a bag grid shows exactly how many 25kg bags of cement and lime to order.
Worldwide mortar mix calculator
Calculate sand, cement and lime quantities for common mortar mixes - a recipe bar shows the mix ratio at a glance, and a bag grid shows exactly how many 25kg bags of cement and lime to order.
The Calculator tab's recipe bar and bag grid for a real job, and the Mix Guide reference tab.
Calculator tab - recipe bar and bag grid for a real job
Mix Guide tab - standard mix classes and build types
A single proportional bar shows the selected mix design's cement, lime and sand split at a glance - change the mix and the bar updates instantly.
Class (i) through Class (iv), plus a masonry cement mix - each with its typical use, browsable any time in a dedicated Mix Guide tab.
Cement and lime totals convert straight to 25kg bag counts, shown as a bag grid - so you know exactly how many to order, not just a raw cubic metre figure.
Single-skin and cavity brickwork, two block thicknesses, render (with a coats field) and repointing - each with its own typical mortar volume rate.
Add every wall, section or repointing job separately with its own build type and area - totals roll up across the whole job automatically.
An editable wastage percentage covers offcuts and spillage. Copy a plain-text summary or export the whole job as a standalone HTML file. Light/dark theme remembers your choice.
Buildxact is a well-known cloud estimating and takeoff platform that includes material takeoff as one of many features. It's built for running a whole estimating pipeline, not a quick mix-and-bag-count check - here's how a focused, one-off tool compares.
| Feature | Mortar Mix Calculator | Buildxact |
|---|---|---|
| Pricing model | One-off purchase after a free trial | Subscription, from ~$169/month (Foundation plan) |
| Works fully offline | ✓ | ✕ |
| Instant standalone mortar mix/bag count | ✓ | ~ |
| Five standard mix designs across six build types, built in | ✓ | ✕ |
| Multiple job sections with a running bag-count total | ✓ | ✓ |
| Full job estimating, quoting & client management | ✕ | ✓ |
| Requires an account/cloud sign-in to use | ✕ | ✓ |
| Wastage allowance you control | ✓ | ✓ |
Comparison based on Buildxact's publicly listed pricing and features as of August 2026 (buildxact.com, softwareadvice.com, capterra.com) - pricing and features change over time, so check buildxact.com for current details. Buildxact is a trademark of its respective owner; this comparison is for informational purposes and isn't sponsored by or affiliated with Buildxact.
Mortar Mix Calculator is a Windows desktop app, free to try from the Microsoft Store.
Yes - Mortar Mix Calculator uses the same shared Metre2 account as Vector, Forma and every other Keystone app. Sign in once and it works everywhere.
No - it's an approximate sizing guide based on commonly-used mortar volume rates and standard mix ratios, not a guarantee of exact quantities. Actual requirements vary by brick or block size, joint width, workmanship and wastage on site - always check against your specification before ordering materials.
Five standard mortar mix designs by volume - Class (i) 1:0:4 through Class (iv) 1:2:9, plus a masonry cement 1:4 mix - each with its typical use, browsable in the Mix Guide tab.