Mortar Types

ASTM mortar types with minimum required compressive strength and material quantities according to ASTM C 270

Specification	Type M	Type S	Type N	Type O
Strength (psi)	2500	1800	750	350
Volume Ratio	1:1/4:3	1:1/2:4 1/2	1:1:6	1:2:9
Cement (Volume %)	0.33	0.22	0.17	0.11
Lime (Volume %)	0.08	0.11	0.17	0.22
Sand (Volume %)	1	1	1	1
Cement (Weight %)	31.3	20.9	15.7	10.4
Lime (Weight %)	3.3	4.4	6.7	8.9
Sand (Weight %)	80	80	80	80

Calculator

Select Mortar Type

Total Mortar Volume Needed (cubic feet)

Cement (by Volume)-- cubic feet

Lime (by Volume)-- cubic feet

Sand (by Volume)-- cubic feet

Cement (by Weight)-- percent

Lime (by Weight)-- percent

Sand (by Weight)-- percent

Compressive Strength-- psi