Limestone Calculator: Tons, Cubic Yards, Compaction & Sub-Base Preparation for Driveways
Calculate tonnage and volume for crushed limestone (#57, #411, Crusher Run), understand compaction shrinkage, and ensure proper sub-base drainage.
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Convert & Count Blog
Practical articles about calculators, unit conversion, everyday math, finance concepts, and using numbers with more confidence.
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Calculators
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The Complete 457(b) Calculator Guide: Contributions, Roth, Loans, Withdrawals, and RMDs
Everything public employees need to know before relying on a 457 calculator — from catch-up rules and Roth options to loans, RMDs, and pairing it with a pension.
Gambrel Roof Calculator: Rafter Angles, Truss Geometry, Barn Slopes & Ridge Heights
Explore the historical and architectural geometry of gambrel roofs, trigonometric calculations for steep and shallow slopes, and head-room maximization.
Floor Joist Sizing & Span Calculator Guide: Lumber Dimensions, Spacing (16 vs 24 OC) & Deflection
A structural framing primer covering joist span tables, species grades (Douglas Fir vs Southern Pine), L/360 deflection limits, and subfloor fastening.
River Rock Calculator: Estimating Cubic Yards, Tons, Depth & Decorative Stone Coverage
Calculate landscape rock coverage, depth requirements based on stone size (1-3 inch vs 3-5 inch), weed barrier preparation, and bulk stone delivery weights.
Fence Post Depth Calculator: Frost Line Depth, Post Hole Ratios & Wind Load Stability
Prevent leaning or heaving fences by applying engineering rules for hole diameter, embedment depth, gravel drainage beds, and concrete pour volumes.
Sonotube Concrete Calculator: Concrete Bags, Cubic Yards & Pier Footing Dimensions
Master the geometry of cylinder footings for deck posts, solar arrays, and pole barns, including bag conversions and below-frost-line depth requirements.
Rafter Length and Roof Pitch: Calculating Run, Rise, Line Length & Degrees for Any Slope
Step-by-step rafter framing math: converting fractional pitches (4/12, 6/12) to angles in degrees, calculating hypotenuse lengths, and deducting ridge boards.
Flooring Calculator Guide: How to Calculate Square Footage, Box Quantities & Waste Factors
Learn how to accurately measure rooms with alcoves, calculate square footage, determine waste allowance for herringbone or straight patterns, and estimate boxes.
Sand Calculator: How Many Cubic Yards, Tons, and Bags of Sand Do You Need for Construction?
Accurately calculate sand volume, wet vs dry density differences, paver bedding thickness, and bulk material costs for residential and commercial jobs.
The Complete Asphalt Calculator Guide: Estimating Tons, Cubic Yards, Thickness & Paving Costs
Everything contractors and homeowners need to know before ordering hot mix asphalt — density factors, sub-base preparation, and tonnage estimation.
Square Roots Explained: Estimation Methods, Long Division Algorithm & Square Root Curves
Explore the mathematics of square roots from Babylonian iterative algorithms to grading curve distributions and radical simplification techniques.
Cross-Sectional Area of a Pipe: Inner vs Outer Diameter, Wall Thickness & Fluid Flow Math
Master pipe cross-sectional geometry, internal bore calculations, Schedule 40/80 pipe dimensions, and fluid velocity flow rate relationships.
The 45-45-90 Right Triangle: Ratio Rules, Hypotenuse Formula, Trigonometry & Solved Examples
A deep dive into the properties, proofs, and real-world carpentry applications of the 45-45-90 isosceles right triangle and its exact irrational side ratios.
Volume of a Truncated Cone (Frustum): Mathematical Derivation, Geometry & Practical Math
How to calculate the exact volume and slant surface area of a conical frustum (truncated cone) using base radii, vertical height, and calculus derivations.
Volume of a Pyramid: Formulas, Triangular, Square and Rectangular Pyramid Geometry
Complete geometric guide to calculating the volume and surface area of regular, oblique, triangular, square, and polygonal pyramids with step-by-step proofs.
Decimal to Fraction Conversion: Formulas, Repeating Decimals & Precision Reference Charts
Turn any decimal into a clean reduced fraction or mixed number, master repeating decimal algebraic conversions, and use precision engineering fraction charts.
How to Simplify Fractions: Greatest Common Factor (GCF), Prime Factorization & Step-by-Step Math
Clear, foolproof guide to reducing proper and improper fractions, finding the greatest common factor, and working with negative numerators and denominators.
Linear Interpolation: Mathematical Formula, Coordinate Calculations & Engineering Applications
Understand the mathematics of linear interpolation (LERP), slope proportionality, table lookups in thermodynamic charts, and multi-point extrapolation.
Significant Figures (Sig Figs): Complete Rules, Rounding Principles & Arithmetic Operations
Eliminate confusion with significant figures in chemistry, physics, and laboratory measurements with this comprehensive rulebook and rounding guide.
Percentage Increase and Decrease: Formulas, Step-by-Step Calculations & Everyday Math
Step-by-step masterclass on calculating percentage increase and decrease with confidence, real-life commercial examples, and common algebraic traps.
Waist-to-Hip Ratio (WHR) Guide for Women and Men: Health Risks, Measurement & Body Composition
Why waist-to-hip ratio is often a better predictor of cardiovascular and metabolic risk than BMI alone, plus exact tape measurement protocols and WHO risk tiers.
Navy Physical Readiness Test (PRT) & PFA Calculator: Scoring Charts, Standards & Rules
Everything you need to know to pass and max the Navy PFA: age-bracketed scoring scales, push-up standards, forearm plank times, and alternate cardio cardio rules.
Running Pace & Speed Calculator Guide: Conversions, Split Times & Race Pacing Strategies
A runner's complete handbook to calculating pace, velocity, splits, and heart rate training zones for 5k, 10k, half marathon, and marathon races.
How to Calculate Your Maintenance Calories: Total Daily Energy Expenditure (TDEE) Explained
Find your true calorie maintenance level by calculating BMR, NEAT, EAT, and the thermic effect of food to dial in fat loss, muscle building, or weight maintenance.
Basal Metabolic Rate (BMR) vs Resting Metabolic Rate (RMR): Formulas & Energy Expenditure
Master the difference between Basal Metabolic Rate and Resting Metabolic Rate, including clinical formulas, lean body mass factors, and TDEE math.
Calories Burned Walking: Formulas for Body Weight, Incline, Pace & Stride Rate
Calculate exactly how many calories you burn walking per mile, minute, and step count using scientific MET equations, incline adjustments, and body weight metrics.
Calorie Deficit for Weight Loss: How to Calculate Energy Balance, BMR & Sustainable Deficits
Learn how to calculate your exact daily calorie deficit for sustainable weight loss, adjust for metabolic adaptation, and avoid common diet plateaus.
The Ultimate Steps to Miles Conversion Guide: Pacing, Stride Length & Distance Charts
Everything you need to convert walking and running steps to miles — complete stride length formulas, cadence metrics, and quick reference distance charts.
Reflection in Geometry: Rules, Formulas & Reflection Calculator Guide
Master geometric reflections step-by-step. Learn reflection formulas for axes and custom lines, rules for coordinates and shapes, and how to use an online reflection calculator.
How to Calculate Percentage Change: Formula, Examples & Common Mistakes
Learn the percentage change formula step-by-step, see real-world examples, and avoid the most common mistakes people make when calculating increase or decrease.
The Complete 457(b) Calculator Guide: Contributions, Roth, Loans, Withdrawals, and RMDs
Everything public employees need to know before relying on a 457 calculator — from catch-up rules and Roth options to loans, RMDs, and pairing it with a pension.
The Complete Guide to Unit Conversions: Metric, Imperial, and Everything In Between
Confused converting units? A clear guide to metric vs. imperial conversions — length, temperature, mass, volume, and more — with tools to get it exact.