PangPang ToolsUseful answers, without the extra steps.
Calculators, converters and text tools. Find what you need.
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Area measurement
Simple dimensions, drawing, triangles, trapezoids and ellipses
Age calculator
Completed years from a birth date
Aggregate & asphalt quantities
Volume and tonnage for aggregate or asphalt
Air Conditioner Cooling Capacity Estimate
Air Conditioner Cooling Capacity Estimate — enter your own values to calculate clear numerical results, with labelled units, validation and scope limitations. A first-pass heat load from floor area, user-set watts/m² and ceiling height factor, not a formal peak cooling design.
Current & power
Amps, watts and three-phase power
Annual leave & allowance
Annual leave & allowance calculators with separate inputs and assumptions
Electric energy & charging
Electric energy & charging calculators with separate inputs and assumptions
Furniture Doorway Fit Checker
Check upright dimensional clearance for furniture through doorways, narrow corridors and elevators, with handling margin.
Area unit converter
Convert square units, acres and pyeong
Man-day and Labor Cost Calculator
Total worker attendance, fractional man-days, and labor charges from per-worker workdays and unit rates.
Statistics
Mean, median, standard deviation and weighted mean
Base64, URL & HTML encoding
Base64, URL & HTML encoding calculators with separate inputs and assumptions
Bulk File Renamer ZIP
Rename copies of up to 20 files using a prefix, optional date and sequence while preserving extensions, then download a ZIP.
Battery & solar energy
Battery & solar energy calculators with separate inputs and assumptions
BMI & basal metabolism
BMI & basal metabolism calculators with separate inputs and assumptions
Bolt circle PCD and hole position calculator
Calculate equal-angle bolt-circle chord spacing, the first hole's XY position and angular pitch from PCD, hole count and start angle.
Break-Even Units and Revenue Calculator
Calculate break-even units, required sales revenue and contribution margin using fixed costs, price and per-unit variable cost.
Masonry & mortar quantities
Brick or block counts and solid-brick mortar volume
Cable drum & cutting stock
Cable drum & cutting stock calculators with separate inputs and assumptions
Cable selection & checks
Size, ampacity, voltage drop and DC loss
Cable tray quantity & fill
Cable tray quantity & fill calculators with separate inputs and assumptions
Vehicle tax & running costs
Car tax, acquisition and fuel costs
Circles & arcs
Circles, sectors, rings, chords and sagitta
Color codes & image picker
Color codes & image picker calculators with separate inputs and assumptions
Conduit quantity, fill & offsets
Conduit quantity, fill & offsets calculators with separate inputs and assumptions
Cone & frustum volume
Cone & frustum volume calculators with separate inputs and assumptions
Cost indices & bid floor
Cost indices & bid floor with dedicated accessible tabs
Construction Daily Report PDF
Generate an A4 construction daily report with workers, activities, equipment, issues and the next-day plan.
Construction quotation & BOQ
Construction quotation & BOQ with dedicated accessible tabs
CSS Pixels, Rem and Points Converter
Convert CSS pixels, rem units and typographic points using a custom root font size and the CSS 96 px/in reference.
Concrete & volume
Shape, openings and concrete bag quantities
Cylinder Surface Area Calculator
Calculate the total, curved and end-cap area of a closed right circular cylinder. Enter your own measurements and review the stated assumptions.
Date difference & D-day
Days between dates, countdowns and elapsed days
Defect Inspection Photo Report
Create a structured A4 defect photo report with inspection location, dates, per-photo notes and action status.
Indoor Dew Point Calculator
Indoor Dew Point Calculator — enter your own values to calculate clear numerical results, with labelled units, validation and scope limitations. Magnus approximation for indoor air; valid within a typical temperature range, not a wall-surface thermal-bridge model.
Drawing Scale Length Converter
Drawing : actual scales, from paper cm to real m
Borrowing limits & ratios
Borrowing capacity, DSR, DTI and LTV
KESCO pre-use inspection fee calculator
KESCO inspection fees, extras and VAT
Electrical Measurement Record PDF
Record insulation, ground resistance and leakage measurements in an A4 electrical inspection table; manually assess compliance.
Equipment Rental Cost Calculator
Calculate rental costs for multiple site machines from days, unit count, daily rates, extras and user-entered tax.
Excavation & backfill
Excavation, trench backfill and soil delivery
Ovulation and Fertile Window Estimate
Ovulation and Fertile Window Estimate. Enter the relevant input fields for a transparent estimate with labelled outputs, source context and important limitations. Cycle-based ovulation approximation; dates cannot establish ovulation, contraception safety, or fertility. Variable cycles need medical guidance.
Fillet Weld Deposit Estimator
Fillet Weld Deposit Estimator: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Floor & wall render
Floor screed and wall render volume
School grades & university GPA
School grades & university GPA calculators with separate inputs and assumptions
Property taxes
Acquisition, holding, comprehensive and capital gains
Image format, size & compression
Convert, resize and compress in one pass
Photo editing
Crop, rotate, watermark, pixelate and remove metadata
PDF conversion & extraction
Images to PDF, PDF to images and native text
Irrigation Water Volume
Irrigation Water Volume: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
JSON validation & formatting
Validate, indent and minify JSON
KEPCO facility contribution calculator
Korean connection and new-route contribution
2026 Korean Business Day Counter
2026 Korean Business Day Counter. Enter the relevant input fields for a transparent estimate with labelled outputs, source context and important limitations. 2026 South Korea public holiday snapshot, excluding weekends; included special dates and substitute days. Uses a fixed 2026 reference year, not a live calendar for later years.
Korean Lunar and Solar Date Converter
Korean Lunar and Solar Date Converter. Enter the relevant input fields for a transparent estimate with labelled outputs, source context and important limitations. Korean Dangi lunar calendar via supported browser Internationalization API; leap-month switch is required for lunar-to-solar. Cross-check important ancestral dates against KASI.
Income, gift & customs taxes
Income, gift, inheritance, retirement and customs taxes
Lighting & illuminance
Required fixtures and estimated lux
Linear Elevation Interpolation
Linear Elevation Interpolation: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Loan repayment & comparison
Repayment plans, early payoff, refinancing and offers
Material Purchase Order PDF
Build an itemized A4 material purchase order with supplier, delivery details, quantities and optional pricing.
SEO metadata & URL slugs
SEO metadata & URL slugs calculators with separate inputs and assumptions
Motor speed & shaft torque
Motor speed & shaft torque calculators with separate inputs and assumptions
Moving Quote Comparator
Compare complete moving costs by carrier: base, ladder lift, appliance relocation and other fees; rank offers.
Pensions & retirement
Public pension, reverse mortgage and retirement savings
Compress PDF Files — Preserve Text or Rasterize Pages
Optimize PDF structure without removing selectable text, or use a lossy image-page mode with explicit warnings and before/after size comparison.
PDF page workspace
Merge, order, extract, number, resize and watermark
Percentage calculator
Percentages, discounts and changes
Pipe volume, flow & paint
Pipe volume, flow & paint calculators with separate inputs and assumptions
Pregnancy Weeks and Due Date Estimate
Pregnancy Weeks and Due Date Estimate. Enter the relevant input fields for a transparent estimate with labelled outputs, source context and important limitations. Standard last-menstrual-period convention: EDD = LMP + 280 days. Cycle variation and ultrasound dating may change the clinical due date.
Pump Hydraulic Power Calculator
Pump Hydraulic Power Calculator — enter your own values to calculate clear numerical results, with labelled units, validation and scope limitations. Water-like incompressible fluid and user-entered pump efficiency; does not size motor or electrical protection.
Tank filling & circulation time
Filling with inflow and outflow, or theoretical circulation time
QR codes & barcodes
QR codes & barcodes with dedicated accessible tabs
Quadratic Equation Roots Calculator
Solve the real roots and vertex of a quadratic equation ax² + bx + c = 0. Enter your own measurements and review the stated assumptions.
Rainwater Harvest Estimator
Rainwater Harvest Estimator: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Ratio calculator
Simplify ratios and solve proportions
Housing, rent & title
Broker fees, title costs, subscription, rent and yield
Rebar & metal quantities
Rebar & metal quantities calculators with separate inputs and assumptions
Diagonals & right triangles
Diagonals, hypotenuse and angles from perpendicular sides
Tank capacity
Capacity and water volume of rectangular or upright round tanks
Regex Pattern Tester
Test bounded JavaScript regular expressions against text and inspect match positions.
Ventilation & air changes
Airflow to ACH, or ACH to required airflow
Take-home pay
Salary, daily, hourly and freelance pay
Savings & compound growth
Monthly savings, required deposits and lump-sum growth
Severance & unemployment
Severance and unemployment benefits
Sheet Metal Bend Allowance
Sheet Metal Bend Allowance: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Site Photo Sheet PDF
Create A4 site photo sheets from up to 12 photos, with project labels, captions and two/four-image layouts.
Slab Formwork Contact Area
Slab Formwork Contact Area: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Slopes & roofs
Grade, angle, surface area and roofing materials
Stair Riser and Tread Calculator
Plan stair step counts, actual riser height and horizontal run from floor rise, target riser and tread depth.
Stocks & investment
Average cost, investment returns, dividends and inflation
Text editing & analysis
Counts, cleanup, case and word frequency
Compare Text Online — Find Added and Removed Lines
Compare original and revised text and see an ordered, readable line-by-line difference showing what was added, removed and unchanged, without uploading.
Three-phase distribution checks
Three-phase distribution checks calculators with separate inputs and assumptions
Finishing material quantities
Finishing material quantities calculators with separate inputs and assumptions
Tip & split bill calculator
Tips and equal shares of a bill
Business statements & contracts
Business statements & contracts with dedicated accessible tabs
Resistors & LED circuits
Resistors & LED circuits calculators with separate inputs and assumptions
Unit converter
Convert length, mass and temperature
Unix Timestamp, UTC and KST Converter
Convert Unix epoch seconds, milliseconds and timezone-aware ISO 8601 values to UTC and Korea time in the browser.
Random UUID v4 Generator
Generate up to thirty random UUID v4 identifiers locally with browser cryptography.
Wall Heat Flow Calculator
Wall Heat Flow Calculator: enter the labelled dimensions or electrical values, calculate related outputs, and review scope limits before using the estimate.
Work hours & holiday pay
Work hours & holiday pay calculators with separate inputs and assumptions
Spreadsheets & PDF tables
Spreadsheets & PDF tables with dedicated accessible tabs
YouTube Revenue from Views and RPM
YouTube Revenue from Views and RPM. Enter the relevant input fields for a transparent estimate with labelled outputs, source context and important limitations. Uses user-supplied realized revenue per 1,000 views (RPM), not advertised CPM or guaranteed YouTube earnings.
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