Business Tools | Federico Calò
17 free tools for SEO, finance, health, marketing, law, HR, real estate, training, and tourism. No registration required.
95 Tools
Schema Generator - JSON-LD and Structured Data
Generate JSON-LD Schema.org markup for 12 types: Article, FAQPage, Product, LocalBusiness, Event and others.
Meta/OG Generator - SEO Tags and Open Graph
Generate complete meta SEO block: title, description, canonical, Open Graph og:title/og:image and Twitter Card.
Robot Configuration File Generator for Federico Calo's Projects
Generate the robots.txt file with ready presets or custom rules for user-agent and Sitemap.
XML Sitemap Generator - Federico Calo's Project
Generate the sitemap.xml for your website: enter URLs manually or use crawl mode.
SERP Previewer - Google Preview
View how your page appears in Google search results. Check title and description.
Readability Analyzer - Readability Analysis
Analyze text readability with 5 formulas: Flesch, Gunning Fog, SMOG, Coleman-Liau, ARI.
Large Language Models text generator
Generate the llms.txt file according to llmstxt.org to help AI models understand your site.
Language/Region Tag Generator
Generate hreflang tags for your multilingual site in HTML head, sitemap XML and HTTP header format.
Break-even Calculator and Contribution Margin
Calculate break-even point, minimum revenue, and contribution margin for products and services.
TDEE Calculator and Macros
Calculate daily calorie requirement (TDEE) and macronutrient distribution using the Mifflin-St Jeor formula.
eGFR CKD-EPI 2021 Calculator - Kidney Function Estimate
Calculate estimated glomerular filtration rate (eGFR) with the 2021 CKD-EPI race-free equation for chronic kidney disease staging.
Cardiovascular Risk Calculator SCORE2 / SCORE2-OP
Estimate 10-year risk of fatal and non-fatal cardiovascular events with the ESC SCORE2 model (adults <70 years) and SCORE2-OP (>70 years).
Business Tool
Free tool for business.
Pediatric Dose Calculator mg/kg
Calculate pediatric dosage for common medications (Taketomo formulary) based on weight and indication. Includes daily maximum dose and number of administrations.
Thermometer Primer Calculator - SantaLucia 1998 Nearest-Neighbor
Calculate the melting temperature (Tm) of primer oligonucleotides with the SantaLucia 1998 thermodynamic nearest-neighbor model. Supports salt correction and mismatches.
OEE Calculator - Overall Equipment Effectiveness
Calculate OEE combining availability, performance, and quality of the production line.
5.0 Transition Simulator - Tax Credit
Simulate Tax Credit Transition Plan 5.0 (DL 19/2024 Art.38) on investments in 4.0 production assets with energy efficiency.
CNC Machine Hourly Cost Calculator
Calculate the hourly cost of a CNC machine by adding depreciation, electricity, cutting tools, setup, and operator labor.
EAN-13 / GTIN Generator and Validator
Generate complete EAN-13 code or validate a GS1 barcode. Check digit calculation algorithm conforms to GS1 General Specifications v24.0.
CAC/LTV/ROAS Calculator
Calculate customer acquisition cost, lifetime value, and advertising spend ROI
Legal and Late Payment Interest Calculator
Calculate legal interest according to art.1284 c.c. and late payment fees D.Lgs 231/2002 with updated MEF and ECB rates.
Total Employee Cost Calculator
Calculate the annual employer cost for an employee with INPS, INAIL, TFR and additional monthly contributions.
Rent Yield and Cap Rate Calculator
Calculate gross yield, net yield, NOI, Cap Rate, and ROI for income properties.
Weighted Average Calculator and Degree Grade
Calculate weighted average of university exams and estimate graduation grade in thousandths with committee bonus.
Hotel RevPAR Calculator, Occupancy and ADR
Calculate RevPAR (Revenue Per Available Room), occupancy rate, ADR and break-even price for accommodations.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Loan Calculator TAN/TAEG
Calculate monthly interest, TAEG and total interest for any French amortising loan (CCD2).
Calculator Margin, Markup and Omnibus
Calculate tax rate, markup and discount as per EU Directive 2019/2161 (Omnibus Directive).
Automobile Toll Calculator 2026
Calculate Auto and Superauto Stamp 2026 by Region. Exemption for BEV, Age Reductions, and Updated Regional Rates.
Fringe Benefit Calculator for Company Cars 2026
Calculate company car fringe benefits 2026. ACI tables, BEV/PHEV/thermal percentages, transitional regime before 2025.
Crypto Tax Calculator Italy 2026
Calculate crypto capital gains tax (33% standard, 26% EMT) and stamp duty 0.2% - L.199/2025 Budget Law 2026.
Mutual Calculator - Interest Rate, TAEG and LTV
Calculate monthly rate, TAEG and LTV for any residential mortgage with French depreciation (CCD2 2026).
Calculator Cap Rate, ROI and Cash-on-Cash Real Estate
Analyze investment property profitability by calculating Cap Rate, ROI, and Cash-on-Cash Return.
ROAS Calculator Campaigns Ads
Calculate ROAS and break-even ROAS to optimize your ad spend on Google Ads, Meta Ads, and other platforms.
Business Tool
Free tool for business.
Inheritance and Gift Tax Calculator
Calculate Italian succession and inheritance tax with updated rates and exemptions as per DLgs. 346/1990 + DLgs. 139/2024.
Legal Interest Calculator and Commercial Late Fee 2026
Calculate legal interest (Art. 1284 CC) and late payment interest (D.Lgs 231/2002) with updated MEF/BCE rates 2026.
Legal Fee Calculator DM 55/2014
Calculate the lawyer's fee based on forensic parameters DM 55/2014 and DM 147/2022: study phase, investigative phase, decision-making phase, and post-decision phase.
Solar Panel Design and Self-Consumption Calculator
Free tool for calculating annual production of FV energy, self-consumption and energy surplus for businesses and installers.
Corporate Carbon Footprint Calculator GHG Scope 1-2-3
Free tool to calculate company GHG emissions (Scope 1, 2, 3) in tCO₂e according to the GHG Protocol.
Validator CIG and CUP ANAC/DIPE
Validate structure of CIG (10 characters) and CUP (15 characters + Dipe checksum for public contracts and L.136/2010 traceability.
EU Procurement Budget Thresholds 2026-2027 Selection Criteria
Verify community thresholds for public contracts 2026-2027 according to EU Regulation 2025/2150-52. Procurement, services, works and concessions.
DNA Sequence Analysis Toolkit
DNA Sequence Analysis Suite: Inverse Complement, GC Content, and Protein Translation (NCBI #1).
Molarity and Dilution Calculator
Chemical calculations suite: Molarity, C1V1=C2V2 dilutions and balanced stoichiometry from coefficients.
Sample Size Calculator and Budget Horizon/ERC
Calculate sample size for clinical studies (Fleiss two proportions) and estimate Horizon Europe/ERC budget for grant applications.
Food Cost Calculator and Menu Engineering Tool
Calculate food cost percentage, absolute margin, and markup to optimize your restaurant or bar's menu.
Allergen Calculator Menu 1169/2011
Check for presence of the 14 mandatory allergens (Attachment II EU Regulation 1169/2011) in your menu ingredients.
GPU VRAM Calculator for Inference LLM on-Premise
Estimate required VRAM for on-prem inference of LLM models with FP16, INT8 and INT4.
What to choose?
Decision tool for choosing between RAG, fine-tuning and prompt engineering based on 5 key factors.
Cost Calculator - Data Breach
Estimate total cost of a corporate data breach using IBM/CLUSIT 2024 model and reference GDPR article 83 sanction.
International Size Converter Pro
Convert clothing and shoe sizes between IT, EU, US, UK, and JP systems with ISO tables and brand-specific notes.
Calculator Margin Collection and Sell-Through Rate
Calculate sell-through percentage, collection margin and remaining inventory cost to optimize fashion purchase management.
Robotics Industrial Return on Investment Calculator
Calculate ROI and Payback Period for Industrial Robotics Automation Projects.
Tax Calculator Deductible Expenses Liberal Allowances for Businesses
Calculate business liberal expenditure deductions: 10% of income (Article 100 TUIR), report excess for 4 years.
Freelance Hourly Rate Calculator
Calculate your daily minimum hourly rate as a freelancer: (living costs + taxes + contributions + margin) / billable hours.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
CSRD/SME Scope Checker
Classify CSRD (ESRS full) obligation or voluntary VSME applicability. Post-Omnibus 2026/470 thresholds assumed: >1,000 emp. & >€450M. Free 3-step wizard.
Business Tool
Free tool for business.
Construction Cost Calculator per m²
Estimate construction cost per square meter for residential, commercial, and industrial. Range of 2024 regional price lists.
Subnet Calculator / CIDR & IP Planner
Calculate subnet mask, IP range, available hosts, and broadcast from CIDR notation. Supports IPv4 and classless subnetting.
Data Bandwidth and Transfer Calculator
Calculate data transfer time based on file size and bandwidth in Mbps. Deterministic calculation.
Erlang C Calculator - Agent Sizing
Staff a contact center with the Erlang C model: calculate the number of agents needed to meet the service level objective.
EOQ Calculator, Reorder Point and Safety Stock
Calculate EOQ, ROP, and safety stock for warehouse optimization.
Multi-Carrier Volume and Chargeable Weight Calculator
Calculate volumetric weight and taxable weight for BRT, SDA, DHL, GLS, and Poste Italiane with official courier volumetric divisors.
Compare Courier Rates IT - BRT, SDA, DHL, GLS, Poste
Compare rates of major Italian couriers (BRT, SDA, DHL, GLS, Poste Italiane) by weight, size, and destination.
Electric Fleet TCO Calculator vs Thermal Vehicles
Calculate total cost of ownership (TCO) comparison between electric and thermal fleet: purchase, energy/fuel, maintenance and incentives.
Crypto Appreciation 2026 - RT and RW Framework
Calculate crypto capital gains tax (33% standard rate 2026) and fill out RT and RW forms for income tax return.
ISEE 2026 Simulator - Ordinary, Current, University
Calculate your 2026 ISEE in the three variants (ordinary, current, university) per DPCM 159/2013. Indicative estimate DSU.
Hiring Incentives Simulator 2026 - INPS Exemptions
Simulate INPS employment tax exemptions for 2026 hires: under 36, disadvantaged women, ZES, former NASpI recipients (D.Lgs 150/2015)
Business Tool
Free tool for business.
Football Results Predictor - Elo + xG + Poisson
Estimate 1X2 odds for a soccer match using the Elo + Expected Goals (xG) + Poisson distribution model.
Mobile Gaming Economic Analysis
Calculate ARPU, LTV, CAC and ROI for mobile games. Simulate monetization scenarios with freemium, subscription, and in-app purchase models.
Gym & Fitness Calculator & Management
Calculate LTV, churn rate, ROI for gym members and breakeven. Simulate subscriber growth scenarios.
Business Tool
Free tool for business.
OSS/IOSS VAT Calculator EU Cross-Border
Calculate OSS, IOSS, or Reverse Charge VAT for cross-border sales in 27 EU countries. Threshold €10,000 (Dir. 2017/2455), IOSS €150. Free in 2026.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Satellite Link Budget Calculator
Calculate RF link budget for LEO/MEO/GEO satellite communications using Friis FSPL formula. Preset Ka/Ku/S-band. Client-only, no AI.
IoT Link Budget Calculator - NB-IoT, LoRaWAN and 5G
Calculate RF link budget for NB-IoT, LoRaWAN (868/915 MHz), and 5G NR with tech presets. Estimate IoT battery life. Verified Friis formula. Client-only.
Business Tool
Free tool for business.
EIP-155, Gas Calculator, Interoperability Layer
Web3 Developer Toolkit: EIP-55 Checksum Validator (pure keccak256), Ethereum Gas Estimator with static presets (D-BT-W3-GAS, no SSRF), and AMM Impermanent Loss Calculator. Client-only, free 2026.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.
Business Tool
Free tool for business.