The Fluid Pressure Calculator multiplies fluid density, depth and local gravity to deliver hydrostatic pressure in Pascals. One metre of freshwater (ρ ≈ 997 kg/m³) produces roughly 9.8 kPa of pressure (NOAA, 2021). Simply enter your three values, hit “Calculate”, and read the result—perfect for fast engineering checks and classroom demonstrations.
Enter wave speed and wavelength, press “Calculate,” and the tool divides the two to give frequency in Hz. For instance, 340 m/s ÷ 0.68 m = 500 Hz—right in the middle of speech frequencies. Sound travels about 343 m/s at 20 °C (NASA, 2022).
Enter voltage and current, press “Calculate”, and the tool instantly returns resistance with two-decimal precision—saving you the manual step of dividing volts by amps. Home outlets deliver 230 V RMS in most regions (IEC 60038), so a 0.23 A load shows about 1 kΩ on this calculator.
Enter voltage and resistance, press “Calculate,” and the tool returns current using $$I=frac{V}{R}$$. For example, 48 V across 24 Ω draws 2 A. Over 90 % of introductory electronics courses teach Ohm’s Law in the first week (Hambley, 2022).
Need voltage fast? Enter current and resistance—your voltage appears instantly. The calculator applies Ohm’s Law: $$V = I times R$$. Electronics routinely use resistors from 1 Ω to 1 kΩ (Horowitz & Hill, 2015).
Use mass (kg) and velocity (m/s) to compute kinetic energy instantly with $$KE = 0.5,m,v^2$$. At 60 kg moving 12 m/s, energy equals 4.32 kJ—roughly the work of lifting that mass 7 m high (NASA, 2023).
Enter mass in kilograms and local gravity in N/kg, click “Calculate,” and the tool multiplies them to return weight in Newtons. Example: 42 kg on Jupiter (24.79 N/kg) → 1 041 N. Earth’s average g is 9.80665 N/kg (CODATA, 2018).
Use this online power calculator to convert work (joules) and time (seconds) into power (watts) in one click. Type any positive values, press “Calculate,” and the tool returns wattage rounded to two decimals. One watt equals one joule of energy transferred every second (NIST, 2019).
Use the online Newton’s Second Law Calculator to multiply mass (kg) by acceleration (m/s²) and get force in Newtons—rounded to two decimals. Enter any non-negative mass and any signed acceleration, then read the result instantly. Earth’s standard gravity is 9.80665 m/s² (NIST, 2023), so a 10 kg object in free fall feels about 98.07 N. Quick, clean, error-free.
