Class capacity & revenue calculator
Enter your room size and class price, and this free calculator works out how many mats genuinely fit, what each class can earn, and — if you add your rent — the fill rate you need to break even. For yoga and other mat-based classes.
Studio Ledger
Class Capacity & Revenue Calculator
Work out what a room is actually worth — the numbers landlords and investors want to see.
What does this calculator tell you?
It tells you three things about a room: its true class capacity, its earning potential, and — if you add rent — whether it can pay for itself. That's useful when you're sizing up a space to hire, negotiating with a landlord, planning a timetable, or working out whether a quiet class is actually costing you money.
The headline number is monthly revenue potential: capacity × fill rate × class price × classes per week, averaged over a month. Alongside it you get revenue per class, revenue per square foot per month (the number landlords think in), and your break-even fill rate.
How does it work out how many mats fit?
It packs mats into the room as a grid, rather than dividing floor area by mat area. First it removes the depth you keep clear at the front for the teacher, props and walkway. Then it adds your chosen gap around each mat, counts how many whole rows and columns fit in what's left, and tries the mats in both orientations — lengthways and across the room — keeping whichever layout holds more.
That's why two rooms with the same floor area can hold different numbers of students: a long, narrow room wastes more space at the edges than a square one. The grid method is honest about that, where an area calculation isn't.
A worked example
Take a 30ft × 20ft room (600 sq ft) with 5ft kept clear at the front, standard mats and a 1ft gap around each. The calculator fits 18 mats in a 6 × 3 grid. At £16 a class and a 65% average fill, that's about £187 per class — and with 14 classes a week, roughly £11,300 a month in revenue potential. If the room rents for £2,400 a month, the break-even fill rate is 14%: every student above that is margin.
Capacity & revenue FAQs
How many yoga mats fit in a 30ft × 20ft studio?
About 18, using standard 2ft × 5'9" mats with a 1ft gap around each and 5ft kept clear at the front for the teacher — a 6 × 3 grid. The answer depends on the room's shape as well as its size: a long, narrow room fits fewer mats than a square room of the same area.
Why does the calculator lay mats on a grid instead of dividing the area?
Because mats are rectangles, not liquid. Dividing floor area by mat area over-counts, since it ignores the part-mat strips left at the edges of the room and the space each student needs around them. The calculator packs whole mats into rows and columns, tries both mat orientations, and keeps whichever fits more.
What is a break-even fill rate?
The percentage of spaces you must sell, on average, for class income to cover the room's rent. If your room costs £2,400 a month and full classes would bring in £8,000, your break-even fill rate is 30% — below that the room loses money. Enter your monthly rent in the calculator to see yours.
What fill rate should I plan with?
Use your own registers if you have them — an honest average over a few months beats any rule of thumb. If you're planning a new studio, model a range: check the numbers still work at a cautious fill rate, not just an optimistic one, and compare each against your break-even.
Does this work for reformer pilates studios?
No — it's built for mat-based classes. In a reformer studio, capacity is fixed by your machine count, not floor space, so there's nothing to calculate: six reformers means six places. See our pilates booking system page for how reservie handles equipment-based capacity.
Is the calculator free?
Yes. It's free to use, there's no sign-up, and nothing you enter is stored or sent anywhere — all the maths happens in your browser.
Running reformer classes? Capacity works differently — see the pilates booking system.
Now fill those mats
In reservie, capacity is a setting on every class — cap it to the mats your room really holds, take bookings and payments online, and let the waitlist backfill cancellations.