Engineering Templates & Workbooks
Practical, professional working templates that complement our calculators and workflows. Each workbook is a structured worksheet that runs in your browser: enter your own project data, calculated cells update from the same engineering engines that power the live tools, and you can print or save a copy as PDF. They are working templates — not a BOQ platform, not project-management software, and not automated quantity-takeoff from drawings.
Concrete Quantity Takeoff & Pour Schedule
A practical takeoff and pour-planning worksheet with project information, calculated volume and ordered concrete totals from your dimensions, quantity, and waste factor, plus a pour schedule with volume totals.
Construction • RebarBar Bending Schedule (BBS) Template
A structured reinforcement scheduling worksheet that computes unit weight and total steel weight from your entered diameters, cutting lengths, and bar counts, reusing the Rebar Weight calculator engine.
Water • DesalinationDesalination Plant Design Basis — Scoping Template
A scoping starting point for a desalination plant design basis: required product flow, plant recovery target, source type, and feed TDS. Load the starters straight into the Plant Designer, where every value stays editable and the tool derives intake, stages, balances and the BOQ from your data.
Excel Engineering Workbook Library
Fifty real Microsoft Excel workbooks, one engineering method each. Download the .xlsx, open it in Excel, Sheets or LibreOffice, enter your own values on the Inputs sheet, and every calculation and PASS / WARN / FAIL check recalculates from the method stated inside the workbook.
RO Mass Balance
Verify feed, permeate and concentrate flows and the salt balance of an RO train.
RO Recovery & Concentrate Flow
Compute permeate and concentrate flows from feed flow and recovery percentage.
RO Energy & Operating Cost
Estimate membrane train energy use, specific power and operating cost per m³.
RO Scaling & Saturation Indices
Langelier, Ryznar and Stiff & Davis indices for RO concentrate scaling tendency.
RO Membrane Element Count
Estimate required 8-inch membrane elements from flux, feed pressure and concentration factor.
Chemical Dosing (Anti-scalant / Sanitizer)
Dose rate of anti-scalant or sanitizer chemical from target concentration and flow.
Pump Total Dynamic Head
Compute total dynamic head from static lift, friction and minor losses.
Pipe Head Loss (Hazen–Williams / Darcy–Weisbach)
Friction head loss and pressure drop in a water line by two methods.
Pipe Sizing by Velocity & Pressure
Select nominal pipe size for design flow within velocity and pressure-drop limits.
Open Channel Flow (Manning)
Channel and pipe capacity and normal depth by Manning's equation.
Water Demand & Peak Flow
Average, design and peak flow demand with fire and storage allowance.
Water Storage Tank Sizing
Size a gravity storage tank for capacity and peak-withdrawal duties.
Tank Fill / Empty Time
Time to fill or empty a tank given inlet/outlet rates.
Water Hammer (Joukowsky Surge)
Estimate surge pressure from sudden valve closure in a pipeline.
Disinfection CT (Chlorine Contact)
Verify chlorine residual × contact time against pathogen inactivation requirement.
Stormwater Runoff (Rational Method)
Peak runoff from a catchment by the rational method.
RC Beam Design (BS 8110)
Flexural and shear design of a singly reinforced rectangular beam.
RC Slab Design (One / Two-Way)
Flexure, shear and deflection check for slab panels by simplified methods.
RC Column Design (Short Column)
Axial capacity and reinforcement of a short braced column.
Isolated Footing Design (ACI 318)
Pad footing: bearing, one-way shear, punching shear and flexural steel.
Retaining Wall Stability (EC7)
External stability of a gravity or cantilever retaining wall: sliding, overturning, bearing.
Steel Beam Design (Elastic)
Elastic section modulus design and shear check for a hot-rolled beam.
Pile Capacity (Static Method)
Estimated ultimate and allowable static capacity of a pile from soil layers.
Concrete & Rebar Quantity Takeoff
Concrete volumes and reinforcement weights for common structural elements.
Bar Bending Schedule
Cutting schedule of reinforcing bars with unit and total steel weights.
Concrete Mix Design (Absolute Volume)
Batch proportions per m³ by the absolute-volume method.
Earthwork Cut & Fill
Cut, fill and net volumes by grid or cross-section areas.
Trench & Excavation Quantity
Trench excavation and bedding/fill volumes.
Masonry & Blockwork Quantity
Blocks per m², mortar volume and cement/sand for masonry walls.
Slab Volume Calculator
Volume of slabs by method, with rebar and form-work estimates.
Pavement Quantity Takeoff
Layer volumes and masses for road pavement.
Bill of Quantities Extensions
Itemised BOQ with automatic extensions, sections and totals.
Steel Embodied Carbon (Screening)
CO₂e of reinforcing steel tonnage with published EPD factors.
Rate Analysis (Construction Item)
Build an all-in unit rate from materials, labour, plant and overheads.
Project Cost Estimate
Category-based estimate with contingency and escalation.
Interim Payment Certificate (IPC)
Monthly payment computation from measured BOQ values, retention and recoveries.
Material Reconciliation
Compare received vs theoretical use, with wastage and variance value.
S-Curve & Earned Value
Plan vs actual progress S-curve with earned value metrics (SPI/CPI).
HVAC Cooling / Heating Load (Simplified)
Peak room load estimate by transparent component method for screening.
Duct Sizing (Velocity / Friction)
Round and rectangular duct sizing from flow and velocity or friction rate.
Pump Sizing & Duty Point
Convert flow and system head into a duty point and absorbed power.
Chilled Water Flow & ΔT
Flow required for a chilled-water duty at design ΔT.
Heat Exchanger LMTD / Sizing
Required area or duty from LMTD (single-pass) with correction factor.
Compressed Air Demand & Receiver
FAD demand from tooling load factors and receiver volume estimate.
Cable Sizing & Voltage Drop (IEC)
Conductor selection for current capacity and voltage drop with adiabatic check.
Load Schedule & Diversity
Connected load to diversified demand for panels and feeders.
Generator / Standby Power Sizing
Size a generator from load schedule and starting conditions.
UPS & Battery Sizing
UPS rating and battery capacity for required autonomy.
Lighting Design (Lumen Method)
Luminaire count and spacing for target illuminance by the lumen method.
Transformer Sizing
Transformer rating from diversified load with margin.