DEVRATE
DEV
RATE
Freelance
Calculator
Theme
$ USD
€ EUR
£ GBP
Ksh KES
C$ CAD
A$ AUD
⬡
Total:
—
Hours:
—
Days:
—
Currency:
USD
▤ Estimate Builder
⊞ Invoice Generator
01
Client & Project Details
▶
Project Name
Client Name
Issue Date
Due / Delivery Date
Client Email
Client Address
Your Name / Company
Your Email
Project Notes / Scope / Payment Terms
02
Base Rate Settings
▶
Hourly Rate (
$
)
Hours Per Day
Base Project Hours
03
Platform Selection
▶
Multiplier:
×1.0
04
Feature Selection
▶
Feature
Hours
Cost (
$
)
＋ Add Custom Feature
Feature total:
0
hrs ·
$0
05
Complexity Multipliers
▶
Backend Complexity
Firebase basic ×1.0
Supabase basic ×1.0
Custom backend APIs ×1.3
Microservices ×1.6
UI Complexity
Basic UI ×1.0
Custom animations ×1.2
Polished UI ×1.4
Complex dashboards ×1.5
06
Integrations & Fixed Costs
▶
Integration / Service
Provider
Cost (
$
)
＋ Add Integration
Integration total:
$0
07
Infrastructure Setup
▶
Infrastructure total:
$0
08
Risk Buffer
▶
10%
25%
15
%
Applied to subtotal — covers scope creep, revisions, unknowns.
09
Client Budget vs. Estimate
▶
Client Budget (
$
)
Budget Note
Budget utilisation
—
Client Budget
—
Your Estimate
—
Difference
Enter a client budget above to see deviation analysis.
10
Final Estimate Summary
▶
Base Hours
120 hrs
Feature Hours
0 hrs
Total Hours
120 hrs
Base Cost
$7,200
Platform ×
×1.0
Backend ×
×1.0
UI ×
×1.0
Adjusted Dev Cost
$7,200
Integrations
$0
Infrastructure
$0
Subtotal
$7,200
Risk Buffer
+$1,080
TOTAL
$8,280
USD
120
Total Hours
20
Work Days
4.0
Weeks
INV
Invoice Configuration
▶
Invoice Number
Status
Draft
Sent
Paid
Tax Rate (%)
Discount (%)
Payment / Bank Details
Footer Note
Additional Line Items
Description
Qty
Unit Price (
$
)
＋ Add Line Item
⟳ Refresh Preview
PRV
Invoice Preview
▶
⊞
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DevRate — Freelance Calculator & Invoice Generator