Digital Life

  • Time Lapse Calculator
    Calculate time-lapse clip length, total frames and shooting time from your interval and playback frame rate. Free, instant photography planner.
  • Timecode to Frames Calculator
    Convert SMPTE timecode (HH:MM:SS:FF) into a total frame count at any frame rate — 24, 25, 29.97, 30, 60 fps and more. Fast and free.
  • Resolution Scale Calculator
    Scale any image or video resolution by a factor. Calculate the new width, height, total pixel count and megapixels instantly with this free tool.
  • Image File Size Calculator
    Estimate an image's file size from width, height, color depth and compression. Get the result in bytes, KB and MB instantly.
  • Frames to Timecode Calculator
    Convert a total frame count to SMPTE timecode (HH:MM:SS:FF) using any frame rate. Get hours, minutes, seconds, frames and total duration instantly.
  • Contrast Ratio Calculator
    Calculate WCAG color contrast ratio from RGB values. Check AA and AAA accessibility compliance using relative luminance: (L1+0.05)/(L2+0.05).
  • Password Entropy Calculator
    Calculate password entropy in bits from length and character set. See strength and estimated crack time using the formula bits = length × log2(charset).
  • Hamming Distance Calculator
    Calculate the Hamming distance between two strings or bit sequences — the number of positions where the symbols differ. Free, instant, and accurate.
  • Chmod Calculator
    Convert Unix file permissions to chmod octal notation. Tick read, write, execute for owner, group, and other to get the 3-digit mode and symbolic string.
  • Amdahl's Law Calculator
    Calculate the theoretical speedup of a program with Amdahl's Law from the parallel portion and the number of processors or speedup factor.
  • Shannon Entropy Calculator
    Calculate Shannon entropy (in bits) from a probability distribution or raw counts using H = −Σ pi log2(pi). Get entropy, max entropy, and efficiency.
  • Password Combination Calculator
    Calculate the total number of possible password combinations and entropy in bits from your character set size and password length.
  • Leaky ReLU Activation Function Calculator
    Compute the Leaky ReLU activation f(x)=x if x>0 else alpha*x. Sweep a range of x values, get a table of (x, f(x)) pairs and plot the curve.
  • Data Transfer Rate Converter
    Convert data transfer speed between bps, kbps, Mbps, Gbps, MB/s, GB/s and binary kibi/mebi/gibi units instantly. SI (1000) and IEC (1024) supported.
  • MIPS to Average Instruction Execution Time Converter
    Convert between a CPU's MIPS rating and the average time to execute one instruction, in both directions, with results in s, ms, us, ns and ps.
  • ReLU (Rectified Linear Unit) Calculator
    Compute the ReLU activation function f(x) = max(0, x) for any real number. Free online Rectified Linear Unit calculator for neural networks.
  • Date to UNIX Time Calculator
    Convert any calendar date and time to UNIX time (UNIX timestamp) — seconds since 1970-01-01 00:00:00 UTC. Supports any UTC offset, including fractional and negative.
  • Table Three-Function Evaluator (3 Variables x, y, z)
    Evaluate up to three math expressions f, g, h over every row of an x, y, z data table. Supports sqrt, trig, log, pow and more. Free online tool.
  • Table Two-Function Evaluator (Two Variables)
    Evaluate two custom expressions f(x,y) and g(x,y) over a table of (x,y) data rows. Supports sqrt, trig, log, atan2 and more. Free online tool.
  • Test Density and Bug Density Calculator
    Compute test density and bug density per LOC and per KLOC from your test count, bug count and source code size. Free software quality metric tool.
  • Timecode (Frame) Calculator
    Add or subtract two SMPTE timecodes (HH:MM:SS:FF) at 30, 29.97, 60 or 59.94 fps. Supports drop-frame and non-drop-frame, returns total frame count.
  • Power of 2 Calculator
    Calculate 2 raised to any power (2^n) instantly. Enter an exponent and get the exact value, including negative and decimal exponents.
  • Table Function Evaluation (3 Variables)
    Evaluate a custom formula f(x, y, z) across every row of a 3-column data table. Batch expression evaluator with sqrt, sin, log, pow and more.
  • One's Complement Calculator
    Calculate the one's complement of any decimal number by flipping every bit within a 4, 8, 16, or 32-bit width. See binary and decimal results instantly.

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