All Calculators & Tools
Browse all CalcsBay calculators and browser tools across math, finance, date and time, conversion, construction, project management, PDFs and documents.
Use the filters to browse the complete directory, or open a category for guided recommendations and related workflows.
62 tools
Percentage Calculator
Calculate a percentage of a number, percent of a total and percentage change.
Math
Free Fall With Air Resistance Calculator
Calculate fall time, impact speed and terminal velocity using the analytical quadratic-drag model.
Math
Potential Energy Calculator
Calculate near-Earth gravitational, universal gravitational and elastic spring potential energy.
Math
Compound Interest Calculator
Project investment and savings growth with recurring contributions, flexible compounding, inflation and return scenarios.
Finance
Mortgage Calculator
Estimate mortgage payments, total interest, housing costs and amortization with optional extra payments.
Finance
Loan Calculator
Calculate loan payments, interest, total cost and amortization, or solve for amount, rate or term.
Finance
Loan Payoff Calculator
See how extra payments change your payoff date and interest, or plan a debt-free target date.
Finance
Auto Loan Calculator
Estimate car payments with down payment, trade-in, tax, fees and rebates, then compare loan terms.
Finance
Rent vs Buy Calculator
Compare renting and buying using mortgage amortization, equity, ownership costs and investment opportunity cost.
Finance
House Affordability Calculator
Estimate a home price and mortgage range from income, debts, down payment and housing costs.
Finance
Retirement Calculator
Project retirement savings, required contributions, income and portfolio drawdown through a planning age.
Finance
Salary After Tax Calculator
Estimate 2026 take-home pay after country-specific income tax and employee social contributions.
Finance
Rental Property Calculator
Estimate rental cash flow, NOI, cap rate, cash-on-cash return, debt service, equity and holding-period IRR.
Finance
Hourly to Salary Calculator
Convert gross pay between hourly, daily, weekly, biweekly, semi-monthly, monthly, quarterly and annual frequencies.
Finance
Invoice Generator
Create professional invoices with tax, discounts, payment details and six designs, then download PDF or an editable project.
Finance
Quote Generator
Create professional quotes and estimates with your logo, items, VAT, discounts and terms, then download a polished PDF.
Browser & Document Tools
Purchase Order Generator
Create professional purchase orders with suppliers, item codes, taxes, delivery details and terms, then download PDF or an editable project.
Browser & Document Tools
Certificate Maker
Design professional certificates individually or in bulk from CSV and Excel, then download PDF, PNG or editable projects.
Browser & Document Tools
Business Card Maker
Design custom front-and-back business cards with your logo, images and QR code, then download image or print-ready PDF files.
Browser & Document Tools
Email Signature Generator
Create a professional email signature with your logo, photo, contact details and social links, then copy or download compatible HTML.
Browser & Document Tools
Receipt Generator
Create payment receipts with items, tax, discounts, partial payments, local autosave and print-ready output.
Browser & Document Tools
PDF Measurement Tool
Calibrate PDF drawings and measure lengths, polylines, polygon areas, perimeters and counted items locally.
Browser & Document Tools
PDF Page Organizer
Merge, rearrange, rotate, delete, duplicate, extract and split PDF pages locally in your browser.
Browser & Document Tools
PDF Drawing Comparison
Compare PDF revisions with overlay, side-by-side, swipe, red/cyan and aligned visual-difference views.
Browser & Document Tools
Barcode Generator
Generate validated Code 128, Code 39, EAN, UPC and ITF-14 barcodes plus printable label sheets.
Browser & Document Tools
Image Resizer & Compressor
Resize JPEG, PNG and WebP images or compress them to a target file size locally in your browser.
Browser & Document Tools
Work Week Calendar
Find the current work week, look up week dates and browse or download a full week number calendar.
Date & Time
Timesheet Calculator
Calculate weekly work hours, breaks, overtime and gross pay, including overnight shifts and printable time cards.
Date & Time
Working Days Calculator
Count, add or subtract working days using a custom workweek and manually entered holidays.
Date & Time
Area Calculator
Calculate and combine rectangle, circle, triangle, polygon and other areas with add/subtract components.
Construction
Cut List Optimizer
Create optimized one-dimensional cutting layouts with multiple stock lengths, kerf, trim and remnants.
Construction
Flooring Layout Calculator
Plan plank direction, stagger, expansion gap, balanced rows, boxes and cost with a scaled diagram.
Construction
Stair Calculator
Calculate straight-stair risers, treads, run, angle, inclined length and custom dimensional checks.
Construction
Concrete Calculator
Plan concrete for multiple slabs, footings, walls, beams and columns with waste, order rounding, weight and cost.
Construction
Rebar Calculator
Estimate reinforcement quantity, total length and steel weight for slabs, walls, footings, beams and columns.
Construction
Concrete Cover Calculator
Calculate and check concrete cover using EN 1992-1-1:2023 Annex P or ACI CODE-318-25 with a transparent calculation trace.
Construction
Eurocode Load Combination Calculator
Generate EN 1990 ULS and SLS load combinations with leading actions, ψ factors, exclusive groups and National Annex overrides.
Construction
Occupant Load Calculator
Calculate design occupant loads for multiple spaces using 2024 IBC model-code factors or custom local factors.
Construction
Rainwater Runoff Calculator
Estimate Rational Method peak flow or rainfall-event runoff volume for composite catchments.
Construction
Excavation Calculator
Calculate bank and loose excavation volume, spoil, truck loads and cost for trenches, pits and battered excavations.
Construction
U-Value Calculator
Calculate ISO 6946 thermal resistance and U-value for multilayer walls, roofs and air-exposed floors.
Construction
Gravel Calculator
Calculate aggregate volume, tonnes, waste, truck loads and cost across multiple shapes.
Construction
Asphalt Calculator
Estimate compacted asphalt volume, tonnes, allowance, truck loads and material cost.
Construction
Drywall Calculator
Estimate plasterboard sheets for walls, rooms and ceilings with openings, waste and cost.
Construction
Roof Pitch Calculator
Convert roof rise and run, angle, percentage slope, pitch ratio and rafter length.
Construction
Concrete Footing Calculator
Estimate concrete volume, weight, premix bags and cost for multiple footing types.
Construction
Concrete Block Calculator
Estimate concrete blocks or CMU with openings, joints, waste, cost, mortar and optional fill.
Construction
Steel Weight Calculator
Search structural sections, calculate steel weight and properties, and build a multi-item take-off.
Construction
Paint Calculator
Estimate paint for multiple rooms and walls with openings, coats, product coverage, waste, pack rounding and cost.
Construction
Tile Calculator
Estimate tiles across multiple areas with exclusions, grout joints, layout waste, cartons, spare tiles and cost.
Construction
Brick Calculator
Estimate bricks for multiple walls with openings, joint size, leaf multiplier, waste, packs, cost and approximate mortar.
Construction
Gantt Chart Creator
Create a detailed project schedule with tasks, dependencies, baselines and critical path.
Project Management
RACI Matrix
Assign Responsible, Accountable, Consulted and Informed roles across project activities.
Project Management
WBS Builder
Create a numbered work breakdown structure with deliverables, work packages and owners.
Project Management
Project Management Plan
Prepare a structured project management plan covering scope, delivery, governance, risk and controls.
Project Management
S-Curve Generator
Compare cumulative planned and actual project progress or cost over time.
Project Management
Drone Map & Markup
Create a local 2D map from drone photos, measure the site, add professional markups and export PDF.
Browser & Document Tools
PDF Editor
Open a PDF, add text, arrows, dimensions and markups, then download it locally.
Browser & Document Tools
Sign a PDF
Draw a signature, add a date or short text, and download a signed copy of your PDF.
Browser & Document Tools
CV / Resume Builder
Create a professional CV with live preview and download PDF, editable DOCX, RTF or TXT files.
Browser & Document Tools
QR Code Generator
Create static QR codes for links, text, Wi-Fi, messages, contacts and locations, then download PNG or SVG.
Browser & Document Tools
Meme Generator
Upload an image, add draggable meme text and download a sharp PNG, JPG or WEBP with no watermark.
Browser & Document Tools