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Free engineering calculators and student tools
Check a lap length, draw a beam’s bending moment diagram or work out concrete and steel. Merge and convert PDFs, count words and build references. Every calculator shows its working, and the file tools never upload your files.
- Concrete VolumeConcrete & materials
- Cement, Sand & AggregateConcrete & materials
- Rebar WeightConcrete & materials
- Stirrup & Bar Cutting LengthConcrete & materials
- Lap & Development LengthStructural
- Brick & BlockConcrete & materials
- Plaster & PaintConcrete & materials
- StaircaseStructural
- Beam CalculatorStructural
- Section PropertiesStructural
- Engineering Unit ConverterSurveying & site
- Slope & GradientSurveying & site
- Land Area from CoordinatesSurveying & site
- Earthwork & ExcavationSurveying & site
- Levelling (Rise & Fall)Surveying & site
- Open Channel Flow (Manning)Water & drainage
- Pipe Head LossWater & drainage
- Stormwater RunoffWater & drainage
- Bearing CapacityGeotechnical
- Retaining Wall StabilityGeotechnical
- Merge PDFPDF tools
- Split PDFPDF tools
- Compress PDFPDF tools
- PDF to ImagePDF tools
- Images to PDFPDF tools
- PDF to WordPDF tools
- Word to PDFPDF tools
- MP4 to MP3Images & media
- Image CompressorImages & media
- Image ConverterImages & media
- Word CounterWriting & study
- Citation GeneratorWriting & study
- GPA CalculatorWriting & study
- QR Code GeneratorImages & media
- AI Writing CheckerWriting & study
- Readability CheckerWriting & study
- Grammar & Spelling CheckerWriting & study
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Popular: Beam calculatorLap lengthMerge PDFWord CounterCitations
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- design codes: EC2, ACI 318, AS 3600, IS 456
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Most used tools
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- Structural Beam Calculator Reactions, shear force, bending moment and deflection diagrams.
- Structural Lap & Development Length Lap and anchorage lengths to Eurocode 2, ACI 318, AS 3600 or IS 456.
- Concrete & materials Concrete Volume Slabs, footings, columns, beams, walls and stairs in m³ or yd³.
- Concrete & materials Cement, Sand & Aggregate Cement bags, sand and aggregate for nominal mixes like 1:2:4 and 1:1.5:3.
- Concrete & materials Rebar Weight Weight of reinforcing steel in kg, tonnes or lb, metric and US bars.
- Geotechnical Bearing Capacity Ultimate and allowable bearing capacity of shallow foundations.
- PDF tools Merge PDF Join several PDF files into one, in the order you choose.
- PDF tools Compress PDF Make a PDF smaller for email and upload limits.
- PDF tools PDF to Word Convert a PDF into an editable Word (.docx) file.
- Writing & study Word Counter Words, characters, sentences, reading time and keywords.
- Writing & study Citation Generator References in APA 7, MLA 9 and Harvard style.
- Writing & study GPA Calculator Semester and cumulative GPA, or percentage from marks.
Latest articles
New guides and study notes, most recent first.
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Soil Compaction Test Methods: Proctor, Sand Cone, Nuclear Gauge and Hilf
Lab and field compaction tests explained, with a worked sand replacement example, typical targets and lot testing rules.
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Stirrup Cutting Length Calculation: Formula, Hooks and Worked Examples
The stirrup cutting length formula worked for a 230 mm column and a 300 × 450 mm beam, with code…
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How to Set Out a Building: Baselines, 3-4-5, Diagonals and Profiles
How to set out a small building from the boundary: baseline, corners, 3-4-5 and diagonal checks, profile boards and levels,…
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Concrete Slump Test: Procedure, Tolerances and What the Result Means
Step-by-step slump test procedure, how the Australian, US and European methods differ, AS 1379 tolerances and what to do with…
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Rise and Fall Method of Levelling: Worked Example and Checks
How to book and reduce levels by rise and fall, with a full worked run, the three-way check, loop misclosure…
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How to Calculate Concrete Volume: Formulas and Worked Examples
Formulas and worked examples for slabs, edge beams, footings, columns, beams and stairs, plus wastage, ready-mix ordering and site-mix quantities.
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Site Engineering
Inspection checklists and quality control for engineers working on construction sites.
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Study Notes
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Calculations checked
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Sources listed
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