Science cluster
Geometry & Trigonometry Calculators
Find areas, volumes, angles, and coordinates for triangles, circles, polygons, and other shapes and solids.
Top calculators
A short starting set for the most common geometry & trigonometry calculators workflows.
Circle Chord, Arc Length, and Segment Area Calculator
Find chord length, arc length, and segment area from a radius and central angle, with a live circle diagram, MathML formulas, and a worked example.
Sphere Volume and Surface Area Calculator | Radius-Based Sphere Geometry
Measure a sphere's volume and surface area from its radius with this calculator. See the formulas, a worked example, and the main assumptions behind the result.
Rolling Acceleration on an Incline Calculator with Friction Check
Find the acceleration, travel time, exit speed, spin rate and the static friction a body needs to roll without slipping down an incline.
Circumcircle Calculator for a Circle Through Three Points
Find the circumcenter, radius, and circle equation for three non-collinear points in the plane.
Coordinate Transformation Calculator: Rotate, Reflect, Dilate Points
Transform any point (x, y) with translations, reflections, rotations, and dilations. Get exact 90° results, a live graph, worked examples, and clear rules.
Circle Area Calculator – Radius, Diameter, Area & Circumference
Calculate a circle's radius, diameter, area, and circumference from a known radius, diameter, or area, with a scaled circle diagram.
Angle of Repose Calculator | Convert μ or Rise/Run to Slope Angle
Estimate a granular material's angle of repose in degrees from coefficient of friction (μ) or a measured rise-to-run slope ratio, with material context and measurement guidance.
Angle of Elevation Calculator - Degrees, Grade, Sight Line
Calculate an angle of elevation or depression from horizontal distance and height difference, with degrees, grade percent, line-of-sight distance, and a rise ratio.
All calculators in this cluster
Browse 47 calculators matched to this topic, or return to the Science category.
Ames Room Illusion Calculator | Forced-Perspective Depth, Angle, and Floor Drop
Estimate the corner depths, back-wall angle, and floor drop for an Ames room illusion seen from a fixed peephole. This calculator helps you plan the skewed geometry behind a classic forced-perspective exhibit.
Angle Between Two Lines Calculator
Determine the acute angle formed by two lines in standard form using pure browser-based calculations.
Angle of Elevation Calculator - Degrees, Grade, Sight Line
Calculate an angle of elevation or depression from horizontal distance and height difference, with degrees, grade percent, line-of-sight distance, and a rise ratio.
Angle of Repose Calculator | Convert μ or Rise/Run to Slope Angle
Estimate a granular material's angle of repose in degrees from coefficient of friction (μ) or a measured rise-to-run slope ratio, with material context and measurement guidance.
Area Converter for Square Meters, Feet, Acres, and Hectares
Convert land, floor-plan, and map areas among metric and US customary units, including square meters, square feet, hectares, acres, and square miles.
Banach–Tarski Sphere Mass and Duplication Calculator
Calculate the hypothetical volume and mass of Banach–Tarski sphere copies from radius, density, and duplication count.
Barycentric Coordinate Calculator for 2D Triangle Points
Find a point’s barycentric coordinates relative to a 2D triangle, interpret its position, and verify determinant-based triangle geometry.
Beehive Honey Yield Calculator - Predict Harvest Volume
Estimate how much honey your beehive will produce based on frame counts and extraction efficiency.
Biochar Soil Amendment Rate Calculator for Garden Beds | Estimate Mass and Volume
Estimate how much biochar to mix into a garden bed using area, incorporation depth, soil bulk density, and target amendment percentage by mass. Get soil volume, soil mass, biochar mass, and approximate loose biochar volume in one step.
Cable Tension Calculator - Determine Support Force
Estimate tension in a suspended cable given load, angle, and desired safety factor. Learn how geometry and safety margins influence overhead line design.
Charles's Law Volume-Temperature Calculator for Gas Expansion
Calculate how a gas's volume changes with temperature under Charles's law when pressure stays constant.
Circle Area Calculator – Radius, Diameter, Area & Circumference
Calculate a circle's radius, diameter, area, and circumference from a known radius, diameter, or area, with a scaled circle diagram.
Circle Chord, Arc Length, and Segment Area Calculator
Find chord length, arc length, and segment area from a radius and central angle, with a live circle diagram, MathML formulas, and a worked example.
Circle Equation Converter | Standard Form to General Form
Convert a circle equation between standard form and general form, read the center, radius, and D/E/F coefficients, and review step-by-step examples with an optional practice game.
Circumcircle Calculator for a Circle Through Three Points
Find the circumcenter, radius, and circle equation for three non-collinear points in the plane.
Clock Angle Calculator | Find the Angle Between Clock Hands
Instantly find the smaller angle between the hour and minute hands for any analog clock time, with formulas, examples, clear explanations, and an optional angle-matching mini-game.
Coaxial Cable Capacitance Calculator
Determine capacitance, geometry, or dielectric properties for coaxial cables via C = 2πϵL/ln(b/a).
Complex Number Calculator – Add, Subtract, Multiply, Divide, Magnitude, and Angle
Use this interactive complex number calculator to add, subtract, multiply, and divide complex numbers. Get results in a + bi form plus magnitude and angle, with formulas, examples, and a fun mini-game.
Contact Lens Diameter and Base Curve Calculator | Sagittal Fit Estimate
Estimate a starting soft contact lens diameter, base curve, sagittal clearance, blink movement, and vertex-adjusted power from HVID and keratometry.
Coordinate Transformation Calculator: Rotate, Reflect, Dilate Points
Transform any point (x, y) with translations, reflections, rotations, and dilations. Get exact 90° results, a live graph, worked examples, and clear rules.
Corrosion Rate Calculator | Coupon Mass Loss to mpy & mm/y
Convert coupon mass loss to a corrosion rate in mpy, mm/y and µm/y with the ASTM G1 constants, then project remaining wall life against a minimum thickness.
CSS Two-Color Gradient Generator for Linear and Radial Backgrounds
Generate two-color linear and radial CSS background gradients with a live preview, angle or radius setting, and copyable CSS declaration.
Deck Footing Concrete Volume Calculator | Concrete Yards and Bag Count for Post Holes
Estimate concrete for deck footings by diameter, depth, and count. See per-footing volume, total cubic feet, cubic yards, and an approximate 80 lb bag count.
Earthwork Cut and Fill Calculator for Rectangular Site Grading
Calculate rectangular site cut or fill volume from average existing and proposed elevations, then estimate loose haul volume using swell and shrinkage factors.
Electric Field of a Charged Ring Calculator (Axial Field)
Calculate the axial electric field of a uniformly charged ring, or solve for charge, ring radius, or axial distance using the standard electrostatics formula.
Gem Faceting Angle Calculator | Critical, Pavilion & Crown Angles
Estimate a gemstone's critical angle and starting pavilion and crown angles from refractive index for lapidary faceting.
Geodesic Dome Strut Length Calculator for A, B, and C Cuts
Calculate ideal A, B, and C strut lengths for 2V and 3V geodesic domes from a chosen radius, then use the chord-based baseline to plan your cut list.
Heat Loss Calculator for Walls, Windows, Roofs, and Floors
Estimate conductive heat loss through a wall, window, roof, floor, or door using area, U-value, and temperature difference. Convert watts into daily kWh and heating cost with this surface heat loss calculator.
Hempcrete Wall Material Calculator: Hurd, Binder, and Water Estimate
Estimate hemp hurd, lime binder, and water for hempcrete walls from wall area, thickness, and mix ratios.
Infiltration Trench Sizing Calculator (Length, Storage, Drain Time)
Calculate required infiltration trench length, runoff storage volume, and estimated drain-down time using drainage area, rainfall depth, trench geometry, aggregate void ratio, and soil infiltration rate.
Infinite Slope Stability Calculator - Shallow Slide Factor of Safety
Estimate the factor of safety for an infinite slope using cohesion, friction angle, unit weight, slope angle, failure depth, and pore pressure ratio.
Leatherworking Stretch and Thickness Calculator | Belt, Wallet, and Hide Planning
Estimate leather stretch compensation, skive depth, stitch margin, and hide area for belts, wallets, holsters, bags, books, and armor projects.
Lime Plaster Mix Calculator | Estimate Wall Coat Materials
Estimate lime plaster volume and ingredient amounts from wall area, coat thickness, and volumetric mix parts. See rough lime, sand, fiber, and water planning figures for a coat or batch.
Neighborhood Walkability Score Estimator - Amenities, Sidewalks & Crossings
Estimate a 0-100 neighborhood walkability score from nearby groceries, parks, bus stops, sidewalk coverage, and crosswalk safety.
Rainwater First Flush Diverter Volume Calculator (Roof Runoff Sizing)
Size a rainwater first flush diverter from roof area and diversion depth, with TWDB and ARCSA benchmarks, standpipe length, and metric or US units.
Rolling Acceleration on an Incline Calculator with Friction Check
Find the acceleration, travel time, exit speed, spin rate and the static friction a body needs to roll without slipping down an incline.
Silage Pile Volume Calculator for Bunkers, Trenches, and Drive-Over Piles
Estimate silage pile volume, as-fed tons, and dry matter tons for bunker silos, trenches, and drive-over piles using field dimensions, density, and moisture content.
Slope-Intercept and Standard Form Converter
Convert y = mx + b to Ax + By = C and back with exact fractions, see the line graphed, and read the slope, intercepts and both forms together.
Solar Declination Angle Calculator (NOAA/Meeus Algorithm)
Compute the Sun's declination for any date and UTC time with the NOAA/Meeus algorithm, plus equation of time, solar noon elevation and day length.
Sphere Volume and Surface Area Calculator | Radius-Based Sphere Geometry
Measure a sphere's volume and surface area from its radius with this calculator. See the formulas, a worked example, and the main assumptions behind the result.
Standard Hyperbola Properties Calculator: Foci, Vertices & Asymptotes
Calculate a standard hyperbola’s equation, vertices, foci, asymptotes, c, and eccentricity from its center, semi-axes, and orientation.
Stream Discharge Calculator (Q = A × V) | River Flow Rate
Estimate stream discharge with the velocity-area method Q = A x V. Rectangular, trapezoidal, or natural cross-sections, float-method velocity, metric or US units.
Surface of Revolution Calculator | Rotate y = f(x) About the x-Axis
Estimate the curved surface area created when y = f(x) is rotated about the x-axis over [a, b]. The calculator explains the formula, inputs, and numerical assumptions.
Terrarium Misting Frequency and Humidity Calculator
Calculate a terrarium misting interval from enclosure volume, ventilation, room humidity, temperature, mist volume and a water-vapour mass balance.
Tree Stand Volume & Timber Cruise Calculator | Quick Board-Foot and Timber Value Estimates
Estimate gross board feet, quality-adjusted net volume, and a rough timber value for one stand using DBH, merchantable height, stocking, species group, and stand quality.
Triangle Center Calculator - Four Classical Centers
Enter triangle vertex coordinates to compute the centroid, incenter, circumcenter, and orthocenter, with formulas, a worked example, and a labeled diagram.
Tubeless Tire Sealant Calculator - Estimate Sealant Volume by Tire Size
Estimate how much tubeless tire sealant to add from tire diameter, width, and fill percentage, with practical notes for setup, upkeep, and common tire sizes.