Section II · 13 tools
Calculators.
Mortgages, loans, interest, taxes, retirement, health, math, and the rest. Every tool computes in arbitrary precision and links its formula in plain language.
13 calculators in physics
Sidereal Time Calculator (Local & Greenwich Mean)
Compute GMST and Local Sidereal Time from any UT date, time, and observer longitude using the standard J2000.0 astronomical algorithm.
Helium Balloons Lift Calculator
Instantly calculate the number of helium balloons needed to lift any object using payload weight, balloon size, and a customizable safety margin.
Brake Specific Fuel Consumption (Bsfc) Calculator
Calculate BSFC from fuel mass flow rate and brake power output. Supports metric (g/kWh) and imperial (lb/hp-h) unit systems for engine efficiency analysis.
Compression Ratio To Psi Calculator
Calculate cylinder pressure in PSI from compression ratio and intake pressure using the polytropic formula P = P_atm x CR^n for gasoline, diesel, or boosted engines.
Windsock Wind Speed Calculator
Estimate wind speed from a windsock's deflection angle using V = Vrated x sin(theta). Supports FAA-standard 15-knot and custom-rated windsocks.
Boat Speed Calculator (Crouch's Formula)
Estimate powerboat top speed in knots using Crouch's Formula — enter displacement, horsepower, and hull type for an instant result.
Crosswind Component Calculator
Calculate the perpendicular crosswind component for any runway using reported wind speed and direction. Essential for pilots planning safe takeoffs and landings.
Catenary Curve Cable Length Calculator
Compute true cable arc length from horizontal span and mid-span sag using the catenary curve equation. Ideal for power lines, bridges, and rigging.
Center Of Mass Calculator
Compute the center of mass for 2 to 5 point masses using x_cm = sum(m_i * x_i) / sum(m_i). Enter masses and positions for instant results.
Bending Stress Calculator
Compute maximum bending stress for rectangular, solid circular, and hollow circular cross-sections using the flexure formula σ = Mc/I.
Liters Per Minute (L/Min) Flow Rate Calculator
Convert any volume and time unit to liters per minute (L/min). Supports mL, gallons, cubic meters, seconds, hours, and more with instant unit conversion.
Material Removal Rate (Mrr) Calculator Milling
Compute milling MRR (in³/min) from axial depth of cut, radial width, spindle speed, flute count, and chip load per tooth.