Conversion Calculator
| Mix | Sand m3 | Coarse Agg.m3 | Water Litres | Use Recommended |
| 1:3:6 | 0.14 | 0.21 | 27 | Rough mass concrete, footings, base courses etc. |
| 1:2.5:5 | 0.11 | 0.17 | 24 | Mass concrete of better class, machinery bases etc. |
| 1:2:4 | 0.09 | 0.14 | 22 | Normal concreting lintols, general reinforced concrete slabs etc. |
| 1:1.2:3 | 0.07 | 0.11 | 20 | High class reinforced concrete water tight basements, walls, tanks etc. |
| 1:1:2 | 0.03 | 0.06 | 18 | Thin section work, fence posts, small precast items |
| Mix | Cement kg | Sand m3 | Coarse Agg.m3 | Water Litres | Cement per m3 "all in" No. bags 50kg each |
| 1:3:6 | 203 | 0.54 | 0.83 | 116 | 4 |
| 1:2.5:5 | 237 | 0.52 | 0.81 | 105 | 4 3.4 |
| 1:2:4 | 291 | 0.55 | 0.79 | 119 | 6 |
| 1:1.2:3 | 361 | 0.48 | 0.74 | 150 | 7 1.4 |
| 1:1:2 | 491 | 0.43 | 0.67 | 169 | 10 |
| 5-3.5 | 7-5 | 10-7 | 14-10 | 21-14 | 32-21 | 42-28 | 84-56 | |
| Hand loaded | 1.3 | 1.7 | - | - | - | - | - | - |
| Power Hopper | - | 2.2 | 3.7 | 5.0 | 6.7 | 8.8 | 12.5 | 21.9 |
| B.S. Ref. | Cross-sectional area | Nom. mass per sq. m. kg | B.S. Ref. | Cross-sectional area | Nom. mass per sq. m. kg | ||
| Main | Cross | Main | Cross | ||||
| A393 | 393 | 393 | 6.16 | B283 | 283 | 193 | 3.73 |
| A252 | 252 | 252 | 3.95 | B196 | 196 | 193 | 3.05 |
| A193 | 193 | 193 | 3.02 | C785 | 785 | 70.8 | 6.72 |
| A142 | 142 | 142 | 2.22 | C503 | 503 | 49.0 | 4.34 |
| A98 | 98.0 | 98.0 | 1.54 | C385 | 385 | 49.0 | 3.41 |
| A1131 | 1131 | 252 | 10.9 | C283 | 283 | 49.0 | 2.61 |
| A785 | 785 | 252 | 8.14 | D49 | 49.1 | 49.1 | 0.770 |
| A503 | 503 | 252 | 5.93 | D31 | 31.4 | 31.4 | 0.492 |
| A385 | 385 | 193 | 4.53 | C636 | 636 | 70.8 | 5.55 |
| Proportion or Ratio | Cubic Capacity m3 | Superficial size with nearest workable depth in mm | ||
| 450 x 450 | 600 x 600 | 750 x 450 | ||
| 1 | 0.035 | 173 | 97 | 104 |
| 2 | 0.070 | 346 | 194 | 208 |
| 3 | 0.105 | 520 | 291 | 312 |
| 4 | 0.140 | .693 | 388 | 415 |
| 5 | 0.175 | .866 | 486 | 519 |
| 6 | 0.210 | .1040 | 583 | 623 |
| 7 | 0.245 | .1213 | 680 | 727 |
| 8 | 0.280 | .1386 | 777 | 810 |
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