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Forensic Science · Tools
Interactive calculators and references built for students, investigators, and legal professionals. Every tool shows the formula it uses, explains how the method works, and states the limits that apply before the result means anything. More tools ship regularly.
Showing 25 of 25 tools
Calculate the angle of impact of a blood droplet from its width-to-length ratio.
Estimate post-mortem interval from body temperature using the Henssge nomogram approach.
Reconstruct a shooting angle from entry and reference point measurements.
Estimate blood alcohol concentration using the Widmark formula for casework context.
Combine STR allele frequencies into a random match probability.
Quick reference for packaging, preserving, and labelling physical evidence.
Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 for text or a file, verify against a known digest, and export a branded report.
Reference table of file signatures (magic numbers) for digital forensic file identification.
Estimate the height of a blood source above the convergence plane from a stain's distance and impact angle.
Estimate pooled blood volume from pool dimensions and express it as a share of total blood volume.
Compute muzzle energy, momentum, energy density and sectional density from bullet mass, velocity and diameter.
Estimate gravitational drop and time of flight over a given range for a flat-fire shot.
Back-calculate blood alcohol concentration from the time of testing to the time of driving.
Compute remaining concentration, elimination constant and clearance time for first-order kinetics.
Convert between mg/L, µg/mL, ng/mL, mg/dL and molar units using molar mass.
Solve C1V1 = C2V2 for stock volume, final concentration or final volume.
Compute the paternity index, combined index and probability of paternity from allele frequency.
Derive allele frequencies from genotype counts and test for equilibrium with chi-square.
Estimate minimum post-mortem interval from accumulated degree hours for an insect development stage.
Estimate living stature from femur, tibia, humerus or radius length using Trotter & Gleser regressions.
Calculate total body surface area burned by Rule of Nines or Lund and Browder, with Parkland fluid volume.
Calculate near and far focus limits and hyperfocal distance for evidence photography.
Convert sectors, clusters and LBA offsets, and calculate allocated space and file slack.
Calculate password entropy in bits, keyspace size and time to crack at a given attack rate.
Convert a charge mass to TNT equivalent and compute scaled distance for post-incident comparison.