Microcement calculator
Calculate kg of microcement, primer and sealer from area, coats and consumption.
Microcement calculator
Calculate how much microcement, primer and sealer you need based on area, number of coats and product consumption.
Length of the surface
Width for floors, height for walls
Check the datasheet – typically 0.8–1.5 kg/m² per coat. Base coats use more than finish coats.
Allowance for mixing, sanding loss and uneven build-up
Your microcement project
33 kg microcement → 3 bags (15 kg) for 7.5 m² floor
Area
7.5 m²
Materials
Buy 3 bags of 15 kg = 45 kg (surplus 12 kg)
Priming 7.5 m² before microcement
2 sealer coats on 7.5 m²
ℹThe result is an estimate based on area, number of coats, consumption per coat and waste.
ℹConsumption varies a lot between products – always follow the manufacturer's datasheet.
Example: a 7.5 m² floor
A 3 × 2.5 m floor is 7.5 m². With 4 coats at 1.0 kg/m² per coat you need about 33 kg of microcement – that's 3 bags of 15 kg.
Calculation for a 3 × 2.5 m floor:
Consumption varies a lot between manufacturers. These figures are indicative – always check the specific product's datasheet.
How to calculate microcement
A microcement system is several coats
Microcement is applied as thin coats over a solid substrate. A typical system is 2 base coats (the coarse layer that builds strength) and 2 finish coats (the fine layer that creates the surface). That's why 4 coats is the default here. Base coats use more material than finish coats – but an overall average of about 1 kg/m² per coat is a good starting point.
Consumption is on the datasheet
Consumption per m² varies a lot between brands and between base and finish products. Always look up the specific product's consumption on the datasheet and enter it in the 'Consumption per coat' field. The calculator uses your value directly, so the result matches your exact product.
Primer and sealer are part of the system
Microcement almost always needs a primer first, so the material bonds, and a sealer at the end, so the surface becomes water- and wear-resistant. The calculator adds about 0.2 L/m² of primer and 2 sealer coats when you tick the boxes.
The substrate must be solid and flat
Microcement can go over tiles, concrete, filled drywall and stable timber floors – but the substrate must be solid, clean and free of movement. Bathrooms and wet rooms need an approved wet-room system. That doesn't change the amount of microcement, but it's critical for the result.
How to use this calculator
Four quick steps – you don't need to be a tradesperson to follow them.
- Pick the surface (floor, wall or countertop) and measure length and width/height.
- Choose the number of coats – 4 (2 base + 2 finish) is a typical full system.
- Look up your product's consumption on the datasheet and enter kg/m² per coat.
- Tick primer and sealer, and add 10 % for waste and mixing.
Common mistakes
Small things that often cost an extra trip to the hardware store.
- Using a generic consumption instead of the figure from your specific product's datasheet.
- Skipping primer or sealer – without them microcement won't bond or last.
- Applying microcement over a substrate that moves or cracks – cracks telegraph through.
- Underestimating drying time between coats so the surface never fully cures.
Example: a 7.5 m² floor
A 3 × 2.5 m floor is 7.5 m². With 4 coats at 1.0 kg/m² per coat that's 30 kg of microcement, and with 10 % waste about 33 kg – so 3 bags of 15 kg. Plus about 1.5 L of primer and 1.5 L of sealer.
Frequently asked questions
Short answers to the questions we hear most often about this calculator.
How much microcement goes on a m²?
A typical system uses about 3–4.5 kg/m² across 2 base coats and 2 finish coats. It varies a lot between brands – always check the datasheet and enter that figure in the calculator.
Can I apply microcement over tiles?
Yes, if the tiles are firmly fixed and the joints are filled flush so the surface is flat. The substrate must be solid, clean and free of movement.
Is microcement waterproof in a bathroom?
Microcement on its own is not a waterproofing membrane. In wet rooms an approved waterproofing system must sit under the microcement, and the surface must be properly sealed.
How many coats do I need?
Most systems are 2 base + 2 finish coats = 4, plus primer and sealer. Thin decorative surfaces can use fewer – follow the manufacturer.
Use the results in a real project
With MyPlanDIY you can save materials, create budgets, track tasks and bring everything together in one project.
No credit card required. Free sample project included.
See also
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