Bedding Mortar Calculator
Estimate mortar bed volume, bag count, bag coverage, wet-to-dry mix volume, joint allowance, and waste for tile, stone, pavers, curbs, and block bedding.
⚙Unit System
📌Real Bedding Mortar Presets
🧱Mortar Bed Inputs
Bedding Mortar Estimate
📊Selected Material and Spec Grid
📐Bedding Mortar Thickness Reference
| Application | Typical bed | Joint allowance | Common use |
|---|---|---|---|
| Thick-set ceramic or porcelain tile | 1/4 to 1/2 in | 2% to 5% | Interior floors over prepared substrate |
| Shower mud or floor leveling bed | 3/4 to 1-1/2 in | 3% to 6% | Slope forming and deck mud fills |
| Natural stone or flagstone | 1 to 2 in | 5% to 8% | Irregular stone with variable underside |
| Paver, brick, or edging bed | 3/4 to 1-1/4 in | 3% to 6% | Pressed bedding strips and landings |
| CMU, cap block, curb, or sill bed | 3/8 to 3/4 in | 8% to 12% | Horizontal bedding joints and setting pads |
📦Common Bag Yield Reference
| Mortar product type | Typical bag size | Mixed yield | Calculator entry |
|---|---|---|---|
| General masonry mortar mix | 80 lb | About 0.60 ft³ | 0.60 ft³ per bag |
| Type S mortar mix | 60 lb | About 0.45 ft³ | 0.45 ft³ per bag |
| Thick-bed tile mortar | 50 lb | About 0.40 ft³ | 0.40 ft³ per bag |
| Deck mud or sand topping mix | 60 lb | About 0.50 ft³ | 0.50 ft³ per bag |
| Metric preblended mortar | 25 kg | About 12 to 14 L | 12 to 14 L per bag |
📏Joint, Waste, and Dry Volume Factors
| Condition | Joint add | Waste add | Dry factor |
|---|---|---|---|
| Smooth tile over flat slab | 2% to 4% | 5% to 8% | 1.20 to 1.25 |
| Back-buttered large format tile | 4% to 7% | 8% to 10% | 1.25 to 1.30 |
| Irregular stone or slab bedding | 6% to 10% | 10% to 15% | 1.30 to 1.35 |
| Block bed joints or curb setting | 8% to 12% | 10% to 15% | 1.25 to 1.35 |
⚖Field Mix Ratio Reference
| Ratio | Mortar character | Best fit | Dry volume split |
|---|---|---|---|
| 1:3 cement to sand | Rich and strong | Stone setting, coping, repairs | 25% cement, 75% sand |
| 1:4 cement to sand | General bedding | Tile beds, curbs, sill pads | 20% cement, 80% sand |
| 1:5 cement to sand | Workable mud bed | Shower deck mud and leveling | 17% cement, 83% sand |
| 1:6 cement to sand | Lean bedding layer | Paver and brick bedding strips | 14% cement, 86% sand |
💡Mortar Estimating Tips
[
{“text”: “amount of mortar required”, “format”: “bold”},
{“text”: “back butter large format tile”, “format”: “bold”},
{“text”: “irregularly shaped natural stone”, “format”: “bold”},
{“text”: “dry loose volume factor”, “format”: “italic”},
{“text”: “compacted wet mortar”, “format”: “italic”},
{“text”: {“text”: “mixed wet volume”, “format”: “italic”},
{“text”: “leaner or richer sand blend”, “format”: “bold”},
{“text”: “risks cold joints”, “format”: “bold”},
{“text”: “costly over ordering”, “format”: “bold”},
{“text”: “irritating shortages onsite”, “format”: “bold”},
{“text”: “presets that adjust accordingly”, “format”: “bold”},
{“text”: “Stop making guesses Start mixing with confidence”, “format”: “underline”},
{“text”: “Plan it out and then take the time to measure twice”, “format”: “underline”},
{“text”: “Spending a few more seconds estimating helps you avoid several minutes of frustration executing”, “format”: “underline”},
{“text”: “shrinkage explains why two bags of mix may end up covering half the space”, “format”: “italic”}
]
