Biological calculators6 calculators
Updated on June 17, 2026
Free AP Biology score calculator with 2025 score distribution. Predict your 1-5 AP exam score from MC and FRQ results instantly.
Calculate the final bacterial population after binary fission (finalCount = initialCount × 2^generations) from a starting cell count and the number of doublings.
Calculate the Hardy-Weinberg genotype frequencies (p², 2pq, q²) from the dominant allele frequency p, with q = 1 − p, for a population in equilibrium.
Calculate the enzyme reaction velocity v = (Vmax × [S]) / (Km + [S]) in µmol/min from Vmax, the Michaelis constant Km, and the substrate concentration.
Calculate the surface-area-to-volume ratio of a spherical cell from its radius (SA/V = 3/r), along with the surface area (4πr²) and volume ((4/3)πr³).
Calculate the total magnification of a compound light microscope by multiplying the objective-lens magnification by the eyepiece (ocular) magnification.