SQREVG550LTS
Concrete mixer SQREVG550LTS
Even mix, pour after pour.
View detailsFree tool · SIMAQ
How many bags of cement do I need?
Short answer
One cubic meter of 1 : 2 : 3 concrete takes about 9 bags of 42.5 kg (8 bags of 50 kg); a 1 : 2 : 4 mix, about 8 bags of 42.5 kg. Multiply length × width × thickness, add 5–10 % waste and round up. Below you calculate it with your dimensions and we tell you which SIMAQ mixer fits and in how many batches. It's a reference estimate: for slabs, beams and columns, your engineer confirms the mix.
SIMAQ · How many bags of cement do I need?
You'll need (reference estimate)
Concrete
1.2 m³
+5 % = 1.26 m³
Cement
11 bags
42.5 kg · exact 11
Sand
0.65 m³
loose
Gravel
0.98 m³
loose
Which SIMAQ mixer fits?
- Fewest batchesConcrete mixer SQREVG550LTS
2 bags per batch · 550 L · gasoline
6 batches
last one with 1 bags
- Concrete mixer SQREVE-365LTS
1.5 bags per batch · 365 L · electric
8 batches
last one with 0.5 bags
- Concrete mixer SQREVG365LTS
1.5 bags per batch · 365 L · gasoline
8 batches
last one with 0.5 bags
The electric one needs a power outlet on site.
Reference estimate. 1 : 2 : 3 ratio by volume, from general site practice; it is not a mix design and doesn't guarantee strength. For slabs, beams and columns confirm the mix with your engineer.
How it's calculated
- Volume = length × width × thickness × number of identical elements (or the m³ if you already have it).
- Add the waste you choose (0, 5 or 10 %).
- Dry material volume = volume × 1.54: loose cement, sand and gravel take more space than placed concrete.
- That dry volume is split by the cement : sand : gravel ratio.
- Bags = cement volume ÷ one bag's volume (its weight ÷ 1,440 kg/m³), always rounded up.
- Batches = bags ÷ the bags per batch each mixer's spec sheet publishes, rounded up.
Assumptions and sources
- Dry volume factor 1.54.Source: general site practice for the volume method (handbooks give 1.52 to 1.57).
- Loose cement density 1,440 kg/m³.Source: general-use value for loose bulk cement.
- 1:3:5, 1:2:4, 1:2:3 and 1:1.5:2.5 ratios by volume.Source: general construction practice; the same ones the SIMAQ School teaches. Not a mix design.
- Bags per batch of each mixer.Source: SIMAQ catalog spec sheets (capacity published in bags). A mixer without that figure is not used.
- Water: not calculated here, it depends on the moisture of sand and gravel.Source: see the water/cement ratio in the SIMAQ School.
Every result is a reference estimate. It doesn't replace a professional's design or supervision.
FAQ
How many bags of cement does one cubic meter of concrete take?
It depends on the ratio. With the dry-volume method, per m³: 1 : 3 : 5: 6 (42.5 kg) / 5 (50 kg) · 1 : 2 : 4: 8 (42.5 kg) / 7 (50 kg) · 1 : 2 : 3: 9 (42.5 kg) / 8 (50 kg) · 1 : 1.5 : 2.5: 11 (42.5 kg) / 9 (50 kg). Add waste and round up. It's a reference estimate.
Why multiply the volume by 1.54?
Because loose cement, sand and gravel take more volume than mixed concrete: fines fill the voids between coarse grains and air escapes. 1.54 is the general-practice factor (1.52 to 1.57 depending on the handbook).
Which mixer do I need, 1.5 or 2 bags?
The bag capacity says how many bags of cement go in per batch. With the 2-bag mixer you do fewer batches for the same pour. In the SIMAQ catalog: SQREVE-365LTS (1.5 bags), SQREVG365LTS (1.5 bags), SQREVG550LTS (2 bags). The calculator tells you how many batches each would take.
Does a 1:2:3 ratio guarantee a strength?
No. Volume ratios are general practice and real strength depends on water, aggregates and curing. For structural elements, your engineer defines the mix with a mix design.
Is the cement bag 42.5 or 50 kg?
Check the weight printed on the bag you'll buy: the calculator lets you pick 42.5 kg or 50 kg and changes the bag count.
The machine for the job
Related SIMAQ machines
Shall we quote the machine?
Send us the result and an advisor contacts you during business hours.