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Speed Converter
Multiply the input by the source unit factor and divide by the destination factor.
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Sphere Surface Area Calculator
Sphere surface area = 4 × π × radius².
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Sphere Volume Calculator
Sphere volume = 4 × π × radius³ / 3.
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Spherical Cap Base Radius Calculator
Find spherical cap base radius as √(h(2R − h)).
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Spherical Cap Surface Area Calculator
Find curved spherical cap area 2πRh.
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Spherical Cap Volume Calculator
Find spherical cap volume πh²(3R − h)/3.
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Split Bill Calculator
Split a bill among friends using a subtotal, sales tax, tip, and number of people.
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Spring Energy Calculator
Ideal spring potential energy = kx²/2.
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Spring Period Calculator
Ideal spring period = 2π × √(mass / stiffness).
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SQL Formatter
Format SQL statements locally with dialect-aware indentation and keyword case options.
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SQL Minifier
Tokenize SQL strings, quoted identifiers and comments, then collapse whitespace outside those regions.
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SQL To JSON Converter
Parse a single INSERT INTO ... (columns) VALUES statement without executing SQL.
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SRT to TXT Converter
Extract plain subtitle text from SRT cues and download a transcript without cue numbers or timestamps.
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SRT to VTT Converter
Convert numbered SRT cues into a WebVTT file with dot-separated milliseconds and plain subtitle text.
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Standard Deviation Calculator
Calculate standard deviation and variance for a number list.
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Standard Error Calculator
Estimate the standard error of a mean as s / √n.
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Standard Error Of Proportion Calculator
Estimate a proportion standard error as √(p(1−p)/n).
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STEP to STL Converter
A binary STL surface mesh. Load a STEP model with the bundled Open CASCADE WebAssembly importer and export its triangle meshes.
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STL to OBJ Converter
OBJ vertices and triangular faces. Read binary or ASCII STL triangles and write an OBJ surface mesh.
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Sum Of Squares Calculator
Add the squares of supplied real values.
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