What stays free?
Every calculator — slab, footing, column, post holes, steps and curb — with the full volume in cubic yards, cubic metres and cubic feet, plus the bag count in all five sizes and a waste allowance. Every mix-ratio page, every worked example, the rebar estimator and the water-cement and cure-time references are free too. No account needed.
What does Premium add?
The jobsite workflow around the numbers: a cost estimator you feed your own local prices into, saved multi-pour projects so a job's footings, slab and steps total together, a printable order sheet to hand the supplier, and saved metric/imperial project profiles.
Are the numbers different in Premium?
No. Volumes and bag counts are identical and free for everyone — that is the whole point of the tool. Premium is about costing, combining and printing, not about hiding quantities.
Are these estimates safe to build from?
They are planning estimates for ordering material, computed from standard volume formulas and typical bag yields. Actual quantities vary with over-excavation, sub-grade loss and spillage, so add a waste allowance. Structural and load-bearing work must follow your local building code and a qualified engineer's specification — see our terms.
How is my access stored?
Purchases are handled by RevenueCat and Stripe. An anonymous purchase id is kept in this browser so MixRatio recognises your Premium on this device. Keep your receipt email for recovery.
I already subscribed on another browser or device — how do I get Premium here?
Head to Restore access and paste the access code shown on this Premium page (or from your receipt). Premium moves to this browser instantly.
Can I cancel?
Yes. Subscriptions renew automatically and can be cancelled anytime from the link in your receipt email. Lifetime is a one-time payment.
Lost your access code?
Your code is shown on this page whenever you're subscribed here, and it's in your purchase receipt email. If you can't find it, reply to your receipt email from the address you paid with — your subscription is tied to it and access can be recovered from there.