Transparent formulas
Each calculator is built around a short formula that can be read and checked by a homeowner. We avoid hidden scoring systems when a clear volume, area, cost, or space estimate is enough.
Methodology
How BuildMetric turns DIY questions into practical estimates.
BuildMetric calculators are designed for homeowners who need a fast, understandable planning number before starting a project. The formulas are simple on purpose, and every tool explains the assumptions behind the result.
Planning estimates
BuildMetric results are intended for early planning. They help compare options, prepare shopping lists, and understand scale before calling a contractor or buying materials.
Conservative guidance
Where uncertainty exists, the calculators highlight assumptions, buffers, and project factors that may increase the final material need or budget.
Readable explanations
Tool pages include a formula summary, planning assumptions, examples, FAQs, and related guides so both people and AI systems can understand the estimate.
Limitations
What the calculators do not replace
BuildMetric does not replace local building codes, permits, professional engineering, contractor quotes, veterinary advice, utility marking, property surveys, or product label instructions.
Real project needs vary by climate, soil, supplier, material quality, local rules, installation method, and site conditions. Use the calculators as a starting point, then verify important decisions before spending money or building.
Send methodology feedbackFormula index
Current calculator formulas
These summaries match the formula blocks shown on each tool page.
Chicken Coop Size Calculator
Homeowners planning a backyard chicken coop footprint before choosing a layout or buying materials.
- Indoor coop space = number of chickens x space per chicken
- Small chickens use 3 sq ft each, medium chickens use 4 sq ft each, and large chickens use 5 sq ft each
- Walk-in coops add a 25% indoor space allowance
- Run space = number of chickens x 10 sq ft
Chicken Run Size Calculator
Choosing a practical chicken run footprint for a backyard flock before building fencing or posts.
- Minimum run space = number of chickens x minimum sq ft per chicken
- Comfortable run space = number of chickens x roomier sq ft per chicken
- Surface type adjusts the target because dirt, mixed ground, and grass wear differently
Chicken Feed Calculator
Estimating how much chicken feed to buy for small backyard flocks over a week or month.
- Daily feed = number of chickens x feed per chicken per day
- Weekly feed = daily feed x 7
- Monthly feed = daily feed x 30
- Bag count = monthly feed divided by selected bag size, rounded up
Raised Garden Bed Soil Calculator
Planning raised bed soil purchases before buying bags, bulk soil, or compost blends.
- Soil volume = bed length x bed width x soil depth
- Depth is converted from inches to feet before calculating cubic feet
- Cubic yards = cubic feet / 27
- Bag count = cubic feet / bag size, rounded up
Shed Cost Calculator
Comparing rough DIY shed budgets before choosing a shed size, finish level, or foundation.
- Shed area = length x width
- Base project cost = shed area x selected cost per square foot
- Estimated total = base project cost + selected foundation allowance
Mulch Calculator
Estimating bagged or bulk mulch for garden beds, tree rings, and landscape refresh projects.
- Mulch volume = area length x area width x mulch depth
- Depth is converted from inches to feet before calculating cubic feet
- Cubic yards = cubic feet / 27
- Bag count = cubic feet / bag size, rounded up
Gravel Calculator
Planning gravel for paths, shed bases, pads, drainage areas, and simple landscaping projects.
- Gravel volume = length x width x depth
- Depth is converted from inches to feet before calculating cubic feet
- Cubic yards = cubic feet / 27
- Approximate tons = cubic yards x selected gravel density
Fence Cost Calculator
Comparing early backyard fence budgets across wood, vinyl, and chain link options.
- Fence material cost = total linear feet x selected material cost per foot
- Gate cost = number of gates x gate allowance
- Estimated total = fence material cost + gate cost
Concrete Slab Calculator
Estimating concrete for patios, shed slabs, utility pads, and small homeowner concrete projects.
- Slab volume = length x width x thickness
- Thickness is converted from inches to feet before calculating cubic feet
- Cubic yards = cubic feet / 27
- Final estimate can include a selected waste allowance
Paint Calculator
Estimating paint gallons for rooms, walls, touch-ups, and simple homeowner painting projects.
- Paint needed = paintable area x number of coats / coverage per gallon
- Gallons to buy are rounded up to the next whole gallon
- Large openings can be subtracted for a tighter estimate