Exposure Triangle & F-Stop
Calculate absolute f-stop adjustments, exposure reciprocity tradeoffs, and sensor noise tradeoffs.
✨ Perfect Balance! Scenario B will render identical image exposure matching Scenario A (Equivalent Triangle Reciprocity).
Explore Additional Utilities
Injector duty cycle — fuel demand ↔ injector size
Match fuel injector sizes (cc/min or lb/hr) with horsepower targets, number of cylinders, and Brake Specific Fuel Consumption (BSFC) targets.
Saddle fit — tree width ↔ horse back angle & measurement
Determine tree width (Narrow, Medium, Wide, Extra Wide) from wither angle measurements and back curvature.
Twist per inch (TPI) — spinning wheel flyer ratio ↔ speed
Calculate twists per inch (TPI) based on flyer ratio, treadles per minute, and fiber intake rate.
Frequency ↔ Wavelength (Sound)
Convert between sound frequency and wavelength in air or water, considering temperature and medium sound speed variations.
Livestock Live Weight ↔ Carcass Yield
Estimate hot carcass weight (HCW), dressing percentage, and final retail cut take-home meat yield for beef, pork, lamb, and goat.
Coordinate converter — WGS84 ↔ local datum
Convert geographic coordinates between global WGS84 (GPS) and local datums, including UTM zone coordinate conversions.
eGFR Kidney Function Calculator
Calculate Estimated Glomerular Filtration Rate (eGFR) using the modern CKD-EPI (2021) equation to evaluate kidney stages.
Color rod weight ↔ color intensity in clear glass
Calculate required color rod weights to achieve target color intensity saturation levels in clear glass gathers.
Legal Billable Hours Estimator
Convert word count of legal drafting documents to estimated billable hours based on complexity and billing rates.
Blowpipe rotation speed ↔ gravity sag correction
Determine optimal rotation speed (RPM) to keep glass centered and correct gravity sag based on viscosity states.
Coal consumption — forge size ↔ hours ↔ kg of fuel
Forecast required metallurgical coal or coke fuel weight for active forge sessions.
Pattern scaling — original size ↔ scaled dimensions
Scale sewing and cutting patterns up or down uniformly. Convert dimensions between source and target sizes.
pH buffer amount — solution volume ↔ ml of pH up/down
Estimate the volume of phosphoric acid (pH Down) or potassium hydroxide (pH Up) needed to adjust nutrient water reservoirs.
Map scale — representative fraction ↔ bar scale
Convert map scale representative fractions (e.g., 1:24,000) to paper sizes, real-world distances, and graphical bar scales.
Soil Permeability Converter
Convert coefficient of permeability (hydraulic conductivity) between cm/s, m/day, ft/day, and m/s with soil type drainage classifications.
Soil Plasticity Index Calculator
Calculate Plasticity Index (PI) from Liquid Limit (LL) and Plastic Limit (PL), and interpret soil state using the Atterberg limits chart.
Reynolds Number Simulator
Determine fluid flow regimes (laminar, transitional, or turbulent) by calculating the dimensionless Reynolds number from velocity, diameter, and viscosity.
Depth ↔ Geostatic & Hydrostatic Pressure
Determine lithostatic (rock overburden) and hydrostatic (fluid) pressure at custom geological underground depths or deep underwater.
Wind Turbine Power Generator
Estimate power output (watts) of a wind turbine based on wind speed, rotor diameter, blade sweep area, and aerodynamic power coefficients.
Precipitation Unit Converter
Convert rainfall and precipitation depth between millimeters, inches, and liters per square meter.